0026-1742 0026-1742 S0026-17422017000200047 Mexico 00 04 2017 00 04 2017 60 2 47 51 1 2007 2 2013 3 2005 3 199-206 4 2014 150 277-8 5 2002 44 1 6 World Health Organization 2003 7 2016 21 14-9