1405-9940 1405-9940 S1405-99402017000400316 10.1016/j.acmx.2017.01.001 Mexico Mexico Mexico Mexico Mexico Mexico Mexico Mexico Mexico Mexico Mexico Mexico Mexico 00 12 2017 00 12 2017 87 4 316 325

1 2013 55 S144–50 2 2012 22 1649–54 3 2012 34 552–68 4 2013 35 1337–49 5 2012 34 1273–89 6 2005 313 302–9 7 2002 12 121–32 8 2004 141 614–27 9 2008 118 1383–93 10 1999 13 657–64 11 2002 30 543–52 12 2004 27 457–64 13 1998 3 295–302 14 2000 16 1123–32 15 2004 17 347–53 16 2000 40 1380–90 17 StataCorp 2011 18 2015 19 1982 248 2004–11 20 1993 328 914–21 21 2005 293 1595–607 22 2015 386 801–12 23 2007 5 444–52 24 2014 57 244–52 25 2000 342 1887–92 26 27 2000 13 418–26