2218-3620 2218-3620 S2218-36202020000200281 Ecuador 00 06 2020 00 06 2020 12 2 281 286

1997 2007 21 45 45 4-19 2012 12 3 3 2010 58 2010 2013 1999 2011 25 289-306 2008 12 43 43 2010 2013 11-49 2005