0186-2391 0186-2391 S0186-23912016000600358 10.18233/apm37no6pp358-361 México 00 12 2016 00 12 2016 37 6 358 361 2009 2016 3 243-9 2009 World Health Organization (WHO) 2002 2008 15 4 4 393-6 2005 13 1 1 15-21