1561-3194 1561-3194 S1561-31942019000500697 Ecuador Cuba Cuba 00 10 2019 00 10 2019 23 5 697 704

1 2015 31 3 3 2 2014 18 3 3 3 2013 7 3 3 4 2016 25 4 4 5 2016 8va 650-1 6 2018 7 2015 8 2014 9 2015 10 2015 11 2018 22 2 2 12 2016 13 2013 53 53 14 2014 13 1 1 15 2016 13 2 2