<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0185-3325</journal-id>
<journal-title><![CDATA[Salud mental]]></journal-title>
<abbrev-journal-title><![CDATA[Salud Ment]]></abbrev-journal-title>
<issn>0185-3325</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0185-33252017000300093</article-id>
<article-id pub-id-type="doi">10.17711/sm.0185-3325.2017.012</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Contextual factors associated with marijuana use in school population]]></article-title>
<article-title xml:lang="es"><![CDATA[Factores contextuales asociados con el consumo de marihuana en población estudiantil]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villatoro Velázquez]]></surname>
<given-names><![CDATA[Jorge Ameth]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bustos Gamiño]]></surname>
<given-names><![CDATA[Marycarmen Noemí]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fregoso Ito]]></surname>
<given-names><![CDATA[Diana Anahí]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fleiz Bautista]]></surname>
<given-names><![CDATA[Clara]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gutiérrez López]]></surname>
<given-names><![CDATA[María de Lourdes]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Amador Buenabad]]></surname>
<given-names><![CDATA[Nancy G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Medina-Mora Icaza]]></surname>
<given-names><![CDATA[María Elena]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz Dirección de investigaciones Epidemiológicas y Psicosociales ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz Dirección General ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2017</year>
</pub-date>
<volume>40</volume>
<numero>3</numero>
<fpage>93</fpage>
<lpage>102</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-33252017000300093&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-33252017000300093&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-33252017000300093&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction Marijuana use among the student population has increased in Mexico and Latin America. There are social, interpersonal and individual factors associated with the onset and continuation of marijuana use. These include the availability of drugs in the community, opportunity for use, low perceived risk of harm from marijuana use and social tolerance by family and close friends. Moreover, these factors increase the probability of experimenting with other drugs, polysubstance use and dependence.  Objective To identify the relationship between the level of urbanization, drug availability, exposure to opportunity for use, risk perception and social tolerance of the level of marijuana use among Mexican middle and high school students.  Method The results are drawn from various surveys conducted in Mexico City and the National Survey of Drug Use among Students 2014. A total of 114 364 middle and high school students participated (49.8% boys and 50.2% girls).  Results Of the respondent 10.6% had used marijuana at least once (12.9% boys and 8.4% girls). The variables that predicted higher marijuana use were drug use approval by family and best friend,, the level of urbanization and low risk perception.  Discussion and conclusion Action must be taken on the factors mentioned to decrease the availability and use of drugs in the environment, and raise awareness of their consequences. These elements must be introduced systematically and creatively into preventive programs in this area.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción El consumo de mariguana en población estudiantil se ha incrementado en México y América Latina. Existen factores sociales, interpersonales e individuales asociados con el inicio y la continuación de su consumo. Entre ellos encontramos la disponibilidad de drogas en la comunidad, la oportunidad de consumo, la baja percepción de riesgo por consumir mariguana, la tolerancia social de la familia y la de los amigos cercanos. Además, estos factores aumentan la probabilidad de experimentar con otras drogas, ser policonsumidor y producir dependencia.  Objetivo Conocer la relación entre el nivel de urbanización, la disponibilidad de drogas, la exposición a la oportunidad de consumo, la percepción de riesgo y la tolerancia social con el nivel de consumo de mariguana en los estudiantes mexicanos de secundaria y bachillerato.  Método Los resultados parten de diversas encuestas realizadas en la Ciudad de México y de la Encuesta Nacional de Consumo de Drogas en Estudiantes 2014. Participaron 114 364 alumnos de secundaria y bachillerato (49.8% hombres y 50.2% mujeres).  Resultados El 10.6% consumieron mariguana alguna vez (12.9% hombres y 8.4% mujeres). Las variables predictoras de un mayor consumo de mariguana fueron la tolerancia ante el consumo de drogas de la familia y del mejor amigo, el nivel de urbanización y una baja percepción de riesgo.  Discusión y conclusión Es necesario incidir en los factores señalados con objeto de disminuir la disponibilidad y el consumo de drogas en el entorno, así como en el conocimiento real de sus consecuencias. Estos elementos deben introducirse sistemática y creativamente en los programas preventivos del área.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Risk factors]]></kwd>
<kwd lng="en"><![CDATA[drug availability]]></kwd>
<kwd lng="en"><![CDATA[exposure to opportunity of use]]></kwd>
<kwd lng="en"><![CDATA[social tolerance]]></kwd>
<kwd lng="en"><![CDATA[marijuana use]]></kwd>
<kwd lng="en"><![CDATA[adolescence]]></kwd>
<kwd lng="es"><![CDATA[Factores de riesgo]]></kwd>
<kwd lng="es"><![CDATA[disponibilidad de drogas]]></kwd>
<kwd lng="es"><![CDATA[oportunidad de consumo]]></kwd>
<kwd lng="es"><![CDATA[tolerancia social]]></kwd>
<kwd lng="es"><![CDATA[consumo de mariguana]]></kwd>
<kwd lng="es"><![CDATA[adolescencia]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Who are the adolescents saying &#8220;No&#8221; to cannabis offers]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Burdzovic Andreas]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Pape]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Bretteville-Jensen]]></surname>
<given-names><![CDATA[A. L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Drug and Alcohol Dependence]]></source>
<year>2016</year>
<volume>163</volume>
<page-range>64-70</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="">
<source><![CDATA[Tendencias del consumo de drogas alguna vez en la vida en Centros de Integración Juvenil. Primer semestre de 2005 &#8211; Primer semestre de 2016]]></source>
<year>2016</year>
</nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chávez]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Villatoro]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Robles]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Bustos]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Moreno]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Oliva]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Paredes]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Encuesta escolar sobre adicciones en el Estado de Jalisco 2012]]></source>
<year>2013</year>
</nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Perceived risks of alcohol and illicit drugs: relation to prevalence of use on individual and country level]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chomynova]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Miller]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Beck]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<source><![CDATA[Journal of Substance Use]]></source>
<year>2009</year>
<volume>14</volume>
<numero>3-4</numero>
<issue>3-4</issue>
<page-range>250-64</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Factores psicosociales de riesgo de consumo de drogas ilícitas en una muestra de estudiantes mexicanos de educación media]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Díaz-Negrete]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[García-Aurrecoechea]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Revista Panamericana de Salud Pública]]></source>
<year>2008</year>
<volume>24</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>223-32</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Motivaciones y recursos para el consumo de sustancias psicoactivas en universitarios]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Duarte]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Varela]]></surname>
<given-names><![CDATA[M. T.]]></given-names>
</name>
<name>
<surname><![CDATA[Salazar]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<name>
<surname><![CDATA[Lema]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Tamayo]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Hacia la Promoción de la Salud]]></source>
<year>2012</year>
<volume>17</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>92-104</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Antecedents and outcomes of marijuana use initiation during adolescence]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[ELLICKSON]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Preventive Medicine]]></source>
<year>2004</year>
<volume>39</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>976-84</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="">
<source><![CDATA[Encuesta Nacional de Consumo de Drogas en Estudiantes 2014: Reporte de Drogas]]></source>
<year>2015</year>
</nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Consumo de drogas en estudiantes universitarios de primer curso]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jiménez-Muro]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Beamonte]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Marqueta]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Gargallo]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Nerín]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
</person-group>
<source><![CDATA[Adicciones]]></source>
<year>2009</year>
<volume>21</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>21-8</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Marijuana use, risk perception, and consequences: Is perceived risk congruent with reality?]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kilmer]]></surname>
<given-names><![CDATA[J. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Hunt]]></surname>
<given-names><![CDATA[S. B.]]></given-names>
</name>
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[C. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Neighbors]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Addictive Behaviors]]></source>
<year>2007</year>
<volume>32</volume>
<numero>12</numero>
<issue>12</issue>
<page-range>3026-33</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Factores de riesgo y de protección en el consumo de drogas en adolescentes y diferencias según edad y sexo]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[López]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Rodríguez-Arias]]></surname>
<given-names><![CDATA[J. L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Psicothema]]></source>
<year>2010</year>
<volume>22</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>568-73</page-range></nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Drugs, alcohol and community tolerance: an urban ethnography from Colombia and Guatemala]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mcllwaine]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Moser]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Environment &amp; Urbanization]]></source>
<year>2004</year>
<volume>16</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>49-62</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Factores de riesgo y de protección relacionados con el consumo de sustancias psicoactivas en estudiantes de enfermería]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Morales]]></surname>
<given-names><![CDATA[B. N.]]></given-names>
</name>
<name>
<surname><![CDATA[Plazas]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Sánchez]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Ventura]]></surname>
<given-names><![CDATA[C. A. A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Revista Latino-Americana de Enfermagem]]></source>
<year>2011</year>
<volume>19</volume>
<numero>^sspe</numero>
<issue>^sspe</issue>
<supplement>spe</supplement>
<page-range>673-83</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Perceived marijuana norms and social expectancies among entering college student marijuana users.]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Neighbors]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Geisner]]></surname>
<given-names><![CDATA[I. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[C. M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Psychology of Addictive Behaviors]]></source>
<year>2008</year>
<volume>22</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>433-8</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Drug use opportunities as opportunities for drug use prevention: Bogotá, Colombia a case in point]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Neumark]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Lopez-Quintero]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Bobashev]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Drug and Alcohol Dependence]]></source>
<year>2011</year>
<volume>122</volume>
<numero>1-2</numero>
<issue>1-2</issue>
<page-range>127-34</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[La búsqueda de un mundo diferente. La representación social que determina la toma de decisiones en adolescentes mexicanos usuarios de drogas ilegales]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Nuño]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Flores]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<source><![CDATA[Salud Mental]]></source>
<year>2004</year>
<volume>27</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>26-34</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="">
<source><![CDATA[Informe sobre uso de drogas en las Américas 2015]]></source>
<year>2015</year>
</nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[A longitudinal examination of alcohol, marijuana, and cigarette perceived norms among middle school adolescents]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pedersen]]></surname>
<given-names><![CDATA[E. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Miles]]></surname>
<given-names><![CDATA[J. N.]]></given-names>
</name>
<name>
<surname><![CDATA[Ewing]]></surname>
<given-names><![CDATA[B. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Shih]]></surname>
<given-names><![CDATA[R. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Tucker]]></surname>
<given-names><![CDATA[J. S.]]></given-names>
</name>
<name>
<surname><![CDATA[D&#8217;Amico]]></surname>
<given-names><![CDATA[E. J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Drug and Alcohol Dependence]]></source>
<year>2013</year>
<volume>133</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>647-53</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Factores de riesgo y protección en grupos de adolescentes policonsumidores]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Peñafiel]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Psicopatología Clínica Legal y Forense]]></source>
<year>2009</year>
<volume>9</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>63-84</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Perceptions of social norms and exposure to pro-marijuana messages are associated with adolescent marijuana use]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Roditis]]></surname>
<given-names><![CDATA[M. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Delucchi]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Chang]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Halpern-Felsher]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
</person-group>
<source><![CDATA[Preventive Medicine]]></source>
<year>2016</year>
<volume>93</volume>
<page-range>171-6</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Capacidad predictiva de la Teoría de la Conducta Planificada en la intención y uso de drogas ilícitas entre estudiantes mexicanos]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rodríguez-Kuri]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Díaz-Negrete]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Gracia-Gutiérrez de Velasco]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Guerrero-Huesca]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Gómez-Maqueo]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Salud Mental]]></source>
<year>2007</year>
<volume>30</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>68-81</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="book">
<collab>Comunicación Social del Senado</collab>
<source><![CDATA[Celebra senadora Cristina Díaz aprobación del uso medicinal de la marihuana]]></source>
<year>2017</year>
<publisher-name><![CDATA[Senado de la República]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Representaciones sociales en jóvenes consumidores y no consumidores de sustancias psicoactivas]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sierra]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Pérez]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Pérez]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Nuñez]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Adicciones]]></source>
<year>2005</year>
<volume>17</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>349-60</page-range></nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Predictors of Marijuana use in adolescents before and after licit drug use: examination of the gateway hypothesis]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tarter]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Vanyukov]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Kirisci]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Reynolds]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Clark]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<source><![CDATA[American Journal of Psychiatry]]></source>
<year>2006</year>
<volume>163</volume>
<numero>12</numero>
<issue>12</issue>
<page-range>2134-40</page-range></nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Relaciones asociativas entre las creencias acerca del uso social de las drogas y el consumo en estudiantes jóvenes]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Trujillo]]></surname>
<given-names><![CDATA[H. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Martínez-González]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Vargas]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Universitas Psychologica]]></source>
<year>2013</year>
<volume>12</volume>
<numero>3</numero>
<issue>3</issue>
</nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[El consumo de drogas en México: Resultados de la Encuesta Nacional de Adicciones, 2011]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Villatoro]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Medina-Mora]]></surname>
<given-names><![CDATA[M. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Fleiz]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Moreno]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Oliva]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Bustos]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Fregoso]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Gutiérrez]]></surname>
<given-names><![CDATA[M. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Buenabad]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
</person-group>
<source><![CDATA[Salud Mental]]></source>
<year>2012</year>
<volume>35</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>447-57</page-range></nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[El consumo de drogas en estudiantes de México: tendencias y magnitud del problema]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Velázquez]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Icaza]]></surname>
<given-names><![CDATA[M. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Sánchez]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Ito]]></surname>
<given-names><![CDATA[D. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Gamiño]]></surname>
<given-names><![CDATA[M. N.]]></given-names>
</name>
<name>
<surname><![CDATA[Escobar]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Salazar]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Cirett]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Hernández]]></surname>
<given-names><![CDATA[I. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Martínez]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
</person-group>
<collab>Dirección de investigaciones Epidemiológicas y Psicosociales, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz.</collab>
<source><![CDATA[Salud Mental]]></source>
<year>2016</year>
<volume>39</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>193-203</page-range></nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Tendencias del uso de drogas en la Ciudad de México: Encuesta de Estudiantes, Octubre 2012]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Villatoro]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Mendoza]]></surname>
<given-names><![CDATA[M. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Moreno]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Oliva]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Fregoso]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Bustos]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Medina-Mora]]></surname>
<given-names><![CDATA[M. E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Salud Mental]]></source>
<year>2014</year>
<volume>37</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>423-35</page-range></nlm-citation>
</ref>
<ref id="B29">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Social norms and self-efficacy among heavy using adolescent marijuana smokers.]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Walker]]></surname>
<given-names><![CDATA[D. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Neighbors]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Rodriguez]]></surname>
<given-names><![CDATA[L. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Stephens]]></surname>
<given-names><![CDATA[R. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Roffman]]></surname>
<given-names><![CDATA[R. A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Psychology of Addictive Behaviors]]></source>
<year>2011</year>
<volume>25</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>727-32</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
