1817-5996 1817-5996 S1817-59962023000200015 Ecuador Ecuador Ecuador 00 06 2023 00 06 2023 25 2

1 2019 7 2 2 479-515 2 2021 12 3 3 163-74 3 2020 14 2 2 4 2021 17 82 82 130-5 5 2021 35 1 1 6 2023 47 2 2 358-78 7 2023 17 2 2 23-9