2011-2173 2011-2173 S2011-21732017000100151 10.17584/rcch.2017v11i1.5616 Colombia 00 06 2017 00 06 2017 11 1 151 158

2010 407- 410 2009 10 3 3 531-9 2015 36 2 2 151-61 2011 2003 2014 20 3 3 213-26 2007 1978 605-25 2006 2013 2008 1952 44 656-92 2016 87 1 1 10-7 2009 18 1 1 11-21 2010 91-106 2014 12 3 3 28-40 2011 College Park, MD, USA 1539-44 R 2009 2013 9 36 36 1-13 2012 36 9-15 1993 2011 5 1 1 130-40 2014 85 1093-103 2016 21 43-9 2001 46 231-4