1817-5996 1817-5996 S1817-59962022000300017 Ecuador 00 09 2022 00 09 2022 24 3

1 2011 33 1 1 27-34 2 2010 12 15 15 3 2002 12 4 4 81-4 4 2018 34 2 2 278-87 5 2018 20 2 2 6 2020 22 ^s1 ^s1 1 7 2021 23 2 2 8 2015 17 ^s1 ^s1 1 201-4 9 2018 20 2 2