1990-8644 1990-8644 S1990-86442022000400055 Ecuador 00 08 2022 00 08 2022 18 87 55 64

2019 51 7 7 416-23 2019 51 4 4 195-7 2019 2019 2022 34 1 1 171-86 2021 2021 29 12 12 7877-85 2021 2019 21 84 84 2018 4 2 2 20-31 2020 23 3 3 327-31 2018