1561-3194 1561-3194 S1561-31942023000800014 Ecuador 00 00 2023 00 00 2023 27

1 2013 28 4 4 64-71. 2 2015 5 2 2 3 2012 4 2011 4 3 3 117-21. 5 2011 5 2 2 171-7 6 2013 50 2 2 7 2023 27 2023 2023 8. 2013 14 1 1 3-11 9 2014 36 3 3