0120-8748 0120-8748 S0120-87482018000200165 10.22379/24224022206 Colombia Colombia Colombia 00 06 2018 00 06 2018 34 2 165 166 1 2016 24 3 3 371-80 2 2009 35 3 3 480-8 3 2013 19 2 2 83-91 4 2016 2016 1-6 5 2016 90 82-90