0034-7434 0034-7434 S0034-74342016000400271 10.18597/rcog.1065 Colombia Colombia Colombia Colombia 00 12 2016 00 12 2016 67 4 271 277

World Health Organization 2004 2 2013 309 2445-6 2004 114 372-6 2009 360 111-20 2013 73 285-6 2011 117 1279-87 2011 118 1047-55 2016 127 657-6 2012 75 108-12 2015 57 547-52 2013 167 1053-9 2012 61 1 1 53 OMS 2015 1-8 2015 32 69-75