2218-3620 2218-3620 S2218-36202019000400238 Cuba Ecuador 00 12 2019 00 12 2019 11 4 238 251

2009 196 1 1 1-20 2015 2 6 6 883-7 2000 5 1987 2003 4 2009 4 1 1 23-38 1992 2011 190 181-99 2007 1 1-15 2010 10 4 4 333-48 2016 62 12 12 556-65