<?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>2444-6483</journal-id>
<journal-title><![CDATA[Endoscopia]]></journal-title>
<abbrev-journal-title><![CDATA[Endoscopia]]></abbrev-journal-title>
<issn>2444-6483</issn>
<publisher>
<publisher-name><![CDATA[Asociación Mexicana de Endoscopia Gastrointestinal A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2444-64832022000300065</article-id>
<article-id pub-id-type="doi">10.24875/end.22000002</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Factores asociados a necesidad de tratamiento endoscópico en pacientes con COVID-19 y hemorragia gastrointestinal alta]]></article-title>
<article-title xml:lang="en"><![CDATA[Factors associated with endoscopic treatment in patients with COVID-19 and upper gastrointestinal bleeding]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castillo-Carrillo]]></surname>
<given-names><![CDATA[Daniel M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Murcio-Pérez]]></surname>
<given-names><![CDATA[Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Mondragón]]></surname>
<given-names><![CDATA[Óscar V.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Solórzano-Pineda]]></surname>
<given-names><![CDATA[Omar M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Blanco-Velasco]]></surname>
<given-names><![CDATA[Gerardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez-Camacho]]></surname>
<given-names><![CDATA[Claudia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Martínez]]></surname>
<given-names><![CDATA[Marina A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Mexicano Del Seguro Social Centro Médico Nacional Siglo XXI Hospital de Especialidades]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2022</year>
</pub-date>
<volume>34</volume>
<numero>3</numero>
<fpage>65</fpage>
<lpage>69</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2444-64832022000300065&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2444-64832022000300065&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2444-64832022000300065&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción: El SARS-CoV-2, causante de la COVID-19, puede afectar el tracto gastrointestinal. No está claro que la COVID-19 grave incremente el riesgo de hemorragia del tubo digestivo alto (HTDA), ni las causas de esta. No se conocen los factores asociados a necesidad de terapia endoscópica.  Objetivo: Describir las alteraciones endoscópicas en pacientes con COVID-19 grave, en quienes se realizó endoscopia superior por HTDA, y los factores asociados a necesidad de tratamiento endoscópico.  Método: Estudio retrospectivo, comparativo y analítico en pacientes hospitalizados con COVID-19 grave que presentaron HTDA y se les realizó endoscopia superior, entre el 1 de marzo de 2020 y el 28 de febrero de 2021.  Resultados: Se incluyeron 21 pacientes con COVID-19 grave y endoscopia superior por HTDA. Hubo 8 mujeres (38%) y 13 hombres (62%), con una media de edad de 53 años (± 12 años). Los hallazgos endoscópicos fueron úlcera duodenal (52%), úlcera gástrica (23%), erosiones gástricas (33%) y várices esofágicas (20%). El único factor asociado a necesidad de tratamiento endoscópico fue la etiología variceal (p = 0.042).  Conclusiones: Los hallazgos endoscópicos más frecuentes en pacientes con COVID-19 grave fueron de causa no variceal. La hemorragia de causa variceal se asoció a mayor necesidad de tratamiento endoscópico.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background: The SARS-CoV-2, the cause of COVID-19, can affect the gastrointestinal tract. Despite this, it is not clear that severe COVID-19 increases the risk of upper gastrointestinal bleeding (UGIB) or its causes. In addition, factors associated with the need for endoscopic therapy are not known.  Objective: To describe the endoscopic alterations in patients diagnosed with severe COVID-19 who underwent upper endoscopy for UGIB, as well as the factors associated with the need for endoscopic treatment.  Method: Retrospective, comparative, and analytical study in hospitalized patients with severe COVID-19 who presented HTDA data and underwent upper endoscopy in the 1st year period. from March 2020 to February 28, 2021.  Results: Twenty-one patients with severe COVID-19 and upper endoscopy due to UGIB were included. Eight were women (38%) and 13 men (62%) with a mean age of 53 years (± 12 years). Endoscopic findings were duodenal ulcer (52%), gastric ulcer (23%), gastric erosions (33%), and esophageal varices (20%). The only factor associated with the need for endoscopic treatment was variceal etiology (p = 0.042).  Conclusions: The most frequent endoscopic findings in patients with severe COVID-19 and UGIB were of non-variceal cause. Variceal bleeding was associated with a greater need of endoscopic treatment.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Hemorragia digestiva alta]]></kwd>
<kwd lng="es"><![CDATA[COVID-19]]></kwd>
<kwd lng="es"><![CDATA[Endoscopia]]></kwd>
<kwd lng="en"><![CDATA[Upper gastrointestinal bleeding]]></kwd>
<kwd lng="en"><![CDATA[COVID-19]]></kwd>
<kwd lng="en"><![CDATA[Endoscopy]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Murcio-Pérez]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Zamarripa-Mottú]]></surname>
<given-names><![CDATA[RA]]></given-names>
</name>
<name>
<surname><![CDATA[Andrade-De Paulo]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Aguilar-Nájera]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Tchekmedyian]]></surname>
<given-names><![CDATA[JA]]></given-names>
</name>
<name>
<surname><![CDATA[Blanco-Velasco]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Adherence to recommendations for endoscopy practice during COVID-19 pandemic in Latin America:how are we doing it?]]></article-title>
<source><![CDATA[BMJ Open Gastroenterol]]></source>
<year>2021</year>
<volume>8</volume>
</nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Torres-López]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[¿Cuál es el origen del SARS-CoV2?]]></article-title>
<source><![CDATA[Rev Med Inst Mex Seguro Soc]]></source>
<year>2020</year>
<volume>58</volume>
<page-range>1-2</page-range></nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Xiao]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Tang]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Zheng]]></surname>
<given-names><![CDATA[X]]></given-names>
</name>
<name>
<surname><![CDATA[Liu]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Li]]></surname>
<given-names><![CDATA[X]]></given-names>
</name>
<name>
<surname><![CDATA[Shan]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Evidence for gastrointestinal infection of SARS-CoV-2]]></article-title>
<source><![CDATA[Gastroenterology]]></source>
<year>2020</year>
<volume>158</volume>
<page-range>1831-3</page-range></nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Harrison]]></surname>
<given-names><![CDATA[AG]]></given-names>
</name>
<name>
<surname><![CDATA[Lin]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Mechanisms of SARS-CoV-2 transmission and pathogenesis]]></article-title>
<source><![CDATA[Trends Immunol]]></source>
<year>2020</year>
<volume>41</volume>
<page-range>1100-15</page-range></nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[MY]]></given-names>
</name>
<name>
<surname><![CDATA[Zhao]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Gao]]></surname>
<given-names><![CDATA[LJ]]></given-names>
</name>
<name>
<surname><![CDATA[Gao]]></surname>
<given-names><![CDATA[XF]]></given-names>
</name>
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[DP]]></given-names>
</name>
<name>
<surname><![CDATA[Cao]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[SARS-CoV-2:structure, biology, and structure-based therapeutics development]]></article-title>
<source><![CDATA[Front Cell Infect Microbiol]]></source>
<year>2020</year>
<volume>10</volume>
<page-range>58726-9</page-range></nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ye]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Yang]]></surname>
<given-names><![CDATA[Z]]></given-names>
</name>
<name>
<surname><![CDATA[Liu]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Liao]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Digestive system manifestations and clinical significance of coronavirus disease 2019:a systematic literature review]]></article-title>
<source><![CDATA[J Gastroenterol Hepatol]]></source>
<year>2021</year>
<volume>36</volume>
<page-range>1414-22</page-range></nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kasinathan]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Sathar]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Haematological manifestations, mechanisms of thrombosis and anti-coagulation in COVID-19 disease:a review]]></article-title>
<source><![CDATA[Ann Med Surg]]></source>
<year>2020</year>
<volume>56</volume>
<page-range>173-7</page-range><publisher-loc><![CDATA[Lond ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gu]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Han]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[COVID-19:gastrointestinal manifestations and potential fecal-oral transmission]]></article-title>
<source><![CDATA[Gastroenterology]]></source>
<year>2020</year>
<volume>158</volume>
<page-range>1518-9</page-range></nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kim]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Doyle]]></surname>
<given-names><![CDATA[JB]]></given-names>
</name>
<name>
<surname><![CDATA[Blackett]]></surname>
<given-names><![CDATA[JW]]></given-names>
</name>
<name>
<surname><![CDATA[May]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Hur]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Lebwohl]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of the coronavirus 2019 pandemic on outcomes for patients admitted with gastrointestinal bleeding in New York City]]></article-title>
<source><![CDATA[Gastroenterology]]></source>
<year>2020</year>
<volume>159</volume>
<page-range>1155-7e1</page-range></nlm-citation>
</ref>
<ref id="B10">
<label>10</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pesavento]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Ceccato]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Pasquetto]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Monticelli]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Leone]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Frigo]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The hazard of (sub)therapeutic doses of anticoagulants in non-critically ill patients with Covid-19:the Padua province experience]]></article-title>
<source><![CDATA[J Thromb Haemost]]></source>
<year>2020</year>
<volume>18</volume>
<page-range>2629-35</page-range></nlm-citation>
</ref>
<ref id="B11">
<label>11</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Patel]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Sengupta]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[PPIs and beyond:a framework for managing anticoagulation-related gastrointestinal bleeding in the era of COVID-19]]></article-title>
<source><![CDATA[Dig Dis Sci]]></source>
<year>2020</year>
<volume>65</volume>
<page-range>2181-6</page-range></nlm-citation>
</ref>
<ref id="B12">
<label>12</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gralnek]]></surname>
<given-names><![CDATA[IM]]></given-names>
</name>
<name>
<surname><![CDATA[Hassan]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Beilenhoff]]></surname>
<given-names><![CDATA[U]]></given-names>
</name>
<name>
<surname><![CDATA[Antonelli]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Ebigbo]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Pellisè]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[ESGE and ESGENA Position Statement on gastrointestinal endoscopy and the COVID-19 pandemic]]></article-title>
<source><![CDATA[Endoscopy]]></source>
<year>2020</year>
<volume>52</volume>
<page-range>483-90</page-range></nlm-citation>
</ref>
<ref id="B13">
<label>13</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Laine]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Barkun]]></surname>
<given-names><![CDATA[AN]]></given-names>
</name>
<name>
<surname><![CDATA[Saltzman]]></surname>
<given-names><![CDATA[JR]]></given-names>
</name>
<name>
<surname><![CDATA[Martel]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Leontadis]]></surname>
<given-names><![CDATA[GI]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[ACG Clinical Guideline:upper gastrointestinal and ulcer bleeding]]></article-title>
<source><![CDATA[Am J Gastroenterol]]></source>
<year>2021</year>
<volume>116</volume>
<page-range>899-917</page-range></nlm-citation>
</ref>
<ref id="B14">
<label>14</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Benites-Goñi]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Pascacio-Fiori]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Monge-del Valle]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Plácido-Damián]]></surname>
<given-names><![CDATA[Z]]></given-names>
</name>
<name>
<surname><![CDATA[Gonzales-Carazas]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Padilla-Espinoza]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Impact of the COVID-19 pandemic in the time to endoscopy in patients with upper gastrointestinal bleeding]]></article-title>
<source><![CDATA[Rev Gastroenterol Peru]]></source>
<year>2020</year>
<volume>40</volume>
<page-range>219-23</page-range></nlm-citation>
</ref>
<ref id="B15">
<label>15</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Trindade]]></surname>
<given-names><![CDATA[AJ]]></given-names>
</name>
<name>
<surname><![CDATA[Izard]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Coppa]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Hirsch]]></surname>
<given-names><![CDATA[JS]]></given-names>
</name>
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Satapathy]]></surname>
<given-names><![CDATA[SK]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Gastrointestinal bleeding in hospitalized COVID-19 patients:a propensity score matched cohort study]]></article-title>
<source><![CDATA[J Intern Med]]></source>
<year>2021</year>
<volume>289</volume>
<page-range>887-94</page-range></nlm-citation>
</ref>
<ref id="B16">
<label>16</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Martin]]></surname>
<given-names><![CDATA[TA]]></given-names>
</name>
<name>
<surname><![CDATA[Wan]]></surname>
<given-names><![CDATA[DW]]></given-names>
</name>
<name>
<surname><![CDATA[Hajifathalian]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Gastrointestinal bleeding in patients with coronavirus disease 2019:a matched case-control study]]></article-title>
<source><![CDATA[Am J Gastroenterol]]></source>
<year>2020</year>
<volume>115</volume>
<page-range>1609-16</page-range></nlm-citation>
</ref>
<ref id="B17">
<label>17</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vanella]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Capurso]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Burti]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Fanti]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Ricciardiello]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Souza Lino]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Gastrointestinal mucosal damage in patients with COVID-19 undergoing endoscopy:an international multicentre study]]></article-title>
<source><![CDATA[BMJ Open Gastroenterol]]></source>
<year>2021</year>
<volume>8</volume>
</nlm-citation>
</ref>
<ref id="B18">
<label>18</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mauro]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[De Grazia]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Lenti]]></surname>
<given-names><![CDATA[MV]]></given-names>
</name>
<name>
<surname><![CDATA[Penagini]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Frego]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Ardizzone]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Upper gastrointestinal bleeding in COVID-19 inpatients:incidence and management in a multicenter experience from Northern Italy]]></article-title>
<source><![CDATA[Clin Res Hepatol Gastroenterol]]></source>
<year>2021</year>
<volume>45</volume>
<page-range>101521</page-range></nlm-citation>
</ref>
<ref id="B19">
<label>19</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Barrett]]></surname>
<given-names><![CDATA[LF]]></given-names>
</name>
<name>
<surname><![CDATA[Lo]]></surname>
<given-names><![CDATA[KB]]></given-names>
</name>
<name>
<surname><![CDATA[Stanek]]></surname>
<given-names><![CDATA[SR]]></given-names>
</name>
<name>
<surname><![CDATA[Walter]]></surname>
<given-names><![CDATA[JW]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Self-limited gastrointestinal bleeding in COVID-19]]></article-title>
<source><![CDATA[Clin Res Hepatol Gastroenterol]]></source>
<year>2020</year>
<volume>44</volume>
<page-range>e80</page-range></nlm-citation>
</ref>
<ref id="B20">
<label>20</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Narváez-Rivera]]></surname>
<given-names><![CDATA[RM]]></given-names>
</name>
<name>
<surname><![CDATA[Cortez-Hernández]]></surname>
<given-names><![CDATA[CA]]></given-names>
</name>
<name>
<surname><![CDATA[González-González]]></surname>
<given-names><![CDATA[JA]]></given-names>
</name>
<name>
<surname><![CDATA[Tamayo-dela]]></surname>
<given-names><![CDATA[Cuesta]]></given-names>
</name>
<name>
<surname><![CDATA[Zamarripa-Dorsey]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Torre-Delgadillo]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Consenso mexicano de hipertensión portal]]></article-title>
<source><![CDATA[Rev Gastroenterol Mex]]></source>
<year>2013</year>
<volume>78</volume>
<page-range>92-113</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
