2306-4102 2306-4102 S2306-41022019000100002 Mexico Mexico Mexico 00 02 2019 00 02 2019 33 1 2 7

1 2012 7 2 2 57-66 2 LEAP Study Group 2008 90 8 8 1738-43 3 2006 88 3 3 281-9 4 2008 89 3 3 422-9 5 2013 27 5 5 293-8 6 2013 37 8 8 1439-41 7 2006 88 10 10 1351-60 8 2014 76 4 4 1076-81 9 1996 172 5 5 569-discussion 573-4 10 2002 52 4 4 641-9 11 1988 28 8 8 1270-3 12 2010 41 2 2 233-9 13 2001 83 1 1 3-14 14 1985 25 3 3 203-8 15 1990 30 5 5 568-discussion 572-3 16 2001 2 17 2016 47 10 10 2127-30 18 2013 66 4 4 531-7 19 2011 42 12 12 1474-9