0300-9041 0300-9041 S0300-90412019000800006 10.24245/gom.v87i8.3143 Mexico Mexico Mexico Mexico Mexico 00 00 2019 00 00 2019 87 8 527 534

1 2004 103 1204-10 2 2005 97 727-32 3 2010 7th ed 4 2017 27 1165-70 5 2016 23 1653-9 6 2018 143 22-36 7 2013 23 964-70 8 2015 34 379-84 9 2018 1-5 10 2017 27 1165-70 11 2003 22 341-6 12 1998 28 673-8 13 2019 10 31-4 14 2014 141 117-24 15 2011 121 94-9 16 2010 3 341-5 17 2009 113 284-90 18 2012 124 496-501 19 2000 18 1606-13 20 1990 38 352-7 21 2016 133 69-75 22 2019 29 447-52 23 2011 103 593-605 24 2009 9 1347-56 25 2018 86 464-77 26 2016 143 83-6 27 ASTEC study group 2009 373 125-36 28 2013 130 452-6