1817-5996 1817-5996 S1817-59962022000300006 Ecuador Ecuador 00 09 2022 00 09 2022 24 3

1 2020 22 2 2 2 2019 21 3 3 3 2017 33 4 4 157-64 4 2019 5 2019 6 2016 26 4 4 562-84 7 2021 8 2015 17 1 1 48-60 9 2019 21 3 3 10 2015 17 2 2 139-44 11 2019 21 2 2 12 2019 21 3 3 13 2018 20 2 2