2218-3620 2218-3620 S2218-36202018000200034 República del Ecuador República del Ecuador 00 02 2018 00 02 2018 10 2 34 39

2016 2009 2012 15 29 29 55-65 2011 2014 2012 7 2015 2013 2012 73 168-83 2015 31 2 2 463-78 2015 11 20 20 2012 2012 2 2015 23 33 33 109-18 2016 2013 9 26 26 5-18 2011 103 52-60 2011