1817-5996 1817-5996 S1817-59962022000300008 Ecuador 00 09 2022 00 09 2022 24 3

1 2021 68 4 4 264-75 2 2019 21 1 1 3 2018 20 3 3 4 2021 23 1 1 5 2019 21 3 3 6 2021 7 2020 22 2 2 8 2020 3 2 2 9 2021 23 3 3 10 2019 21 3 3 11 2020 22 2 2 12 2019 21