1560-4381 1560-4381 S1560-43812019000401470 Ecuador 00 12 2019 00 12 2019 23 4 1470 1472

1 2006 48 1 1 4 2 2018 9 295 3 2006 48 1 1 24-9 4 2016 55 4 4 340-7 5 2018 110 1 1 12-28 6 2018 10 ^s2 ^s2 2 342-52 7 2018 66 4 4 721-7 8 2018 8 91