1390-1249 1390-1249 S1390-12492021000200007 Ecuador Peru Ecuador 00 08 2021 00 08 2021 70 7 14 1977 2 79-98 1994 53 111-27 2015 1-34 2005 107 3 3 383-94 1994 96 2 2 333-69 2017 45 65-92 2005 29 107-48 2002 2008 1892 2008