2550-6722 2550-6722 S2550-67222017000300006 Ecuador 00 04 2017 00 04 2017 1 6 13

2012 2014 2001 2010 2007 2016 98 98 35-50 2005 2011 2012 2014 23 23 117-35 2016 98 98 83-95 2013