0121-0793 0121-0793 S0121-07932017000200230 10.17533/udea.iatreia.v30n2a12 Colombia Colombia Colombia 00 04 2017 00 04 2017 30 2 230 237

2015 1995 2008 2015 24 2015 1983 237 1997 90 9 9 515-20 2004 127 21-33 2012 83 9 9 864-7 2016