2218-3620 2218-3620 S2218-36202019000400135 Ecuador 00 12 2019 00 12 2019 11 4 135 140

2017 18 1 1 1-6 2017 12 30 30 1757-66 2009 56 2 2 56-63 2017 2017 3 1 1 42-9 2017 2017 2017 7 44 44 1-9 2017 73 3 3 602-14 México: Secretaría de Salud 2012 2014 8 2 2 50-5 2016 2017 49 153-9 2017 174 3-4 3-4 183-9