0124-0064 0124-0064 S0124-00642016000600946 10.15446/rsap.v18n6.51755 Colombia Colombia 00 12 2016 00 12 2016 18 6 946 952

1 2003 15 27:31 2 2008 1685 7-13 3 2006 465 4 2009 29 2 2 66-9 5 2007 11 4 4 151-8 6 2010 16 1 1 11-40 7 2006 6-12 8 2002 39 7 7 325-9