1560-4381 1560-4381 S1560-43812019000100275 Ecuador 00 03 2019 00 03 2019 23 1 275 280 1 2018 25 9 9 846-984 2 2018 11 297-306 3 2018 11 155-67 4 2014 4 3 3 5 2012 44 7 7 387-93 6 2015 19 3 3 465-82 7 2014 142 4 4 458-66 8 2018 9 10 10 9498-511 9 2018 15 4 4 403-10