0120-8748 0120-8748 S0120-87482018000400259 10.22379/24224022224 Colombia Colombia Colombia 00 12 2018 00 12 2018 34 4 259 260 1 2018 13 2 2 250-7 2 2018 114 84-9 3 2014 29 1 1 77-82 4 2014 21 5 5 765-8