1561-3194 1561-3194 S1561-31942023000800009 Ecuador 00 00 2023 00 00 2023 27

1 2021 2 2015 52 2 2 208-16 3 2019 4 2008 29 1 1 21-24. 5 2020 84 3 3 308-15 6 2018 92 6 6 6-15. 7 2020 43 2 2 217-23 8 2018 9 2017 10 2010 11 2020 12 2017