0121-0319 0121-0319 S0121-03192016000300055 10.18273/revmed.v29n3-2016006 Colombia Colombia Colombia Colombia 00 12 2016 00 12 2016 29 3 55 60

2012 40 4 4 247-8 2012 46 6 6 950-9 2014 150 78-83 2007 35 1 1 56-64 2013 98 4 4 72 2015