0121-8123 0121-8123 S0121-81232020000400243 10.1016/j.rcreu.2020.09.001 Colombia 00 12 2020 00 12 2020 27 4 243 244 1 2010 22 213-7 2 2012 40 77-82 3 2013 94 2093-102 4 2017 29 256-60 5 2018 99 178-93 6