2477-9199 2477-9199 S2477-91992021000100102 10.26807/cav.vi11.405 Ecuador 00 11 2021 00 11 2021 11 102 121

(200 8) 9 9 2019 1996 2004 3-22 2012 29 29 2-5 2017 38 38 19-29 2019 2003 31 8-22 2018 2019 2018 7 7 137-58 2015 58 58 125-43