0036-3634 0036-3634 S0036-36342018000400012 10.21149/8790 Mexico Mexico Mexico Mexico 00 08 2018 00 08 2018 60 4 385 386 1 Organización Mundial de la Salud 2017 2 2013 15 1 1 54-63 3 2013 4 24-67 4 2013 8 1 1 32-43 5 2013 6 2005 5 3 3 353-64