1390-1249 1390-1249 S1390-12492021000300007 Ecuador Chile 00 12 2021 00 12 2021 71 7 12 2000 15 221-40 2019 73 95-116 2005 2017 11 2 2 211-27 2003 2017 55 2 2 133-47 2020 2007 2007 433-48 2021