0124-6127 0124-6127 S0124-61272021000200157 10.17151/difil.2021.22.39.9 Colombia 00 12 2021 00 12 2021 22 39 157 172

1993 511 511 3-5 1999 2007 2002 1996 1997 2009 1968 2014 2016 20 20 145-56