2529-850X 2529-850X S2529-850X2020000400005 10.19230/jonnpr.3283 Venezuela Venezuela Venezuela Venezuela 00 00 2020 00 00 2020 5 4 428 435

1 2015 75 3 3 155-63 2 Organizaciónn Mundial de la Salud 2012 3 2016 4 2014 5 2013 22 1 1 10-4 6 2012 58 4 4 285-90 7 2006 74 2 2 89-94 8 1986 155 5 5 1140