2218-3620 2218-3620 S2218-36202020000200363 Ecuador Ecuador 00 06 2020 00 06 2020 12 2 363 368

1965 2018 27 1 1 101-26 2010 2004 2008 2017 51 51 71-83 2015 30 73 73 111-38 2015 1998 1996 2018 45 1-22 2020 2016 127 2 2 633-52 2017 1987