0026-1742 0026-1742 S0026-17422017000600026 México México Mexico México 00 12 2017 00 12 2017 60 6 26 29

1 1999 165 937-9 2 2004 35 228-31 3 2016 16 508-10 4 2015 66 158-63 5 2014 31 49-52 6 2004 187 394-7 7 1999 165 73-4 8 1998 45 69-75 9 2006 59 349-54