0300-9041 0300-9041 S0300-90412017000300196 Spain 00 00 2017 00 00 2017 85 3 196 201

SEGO 2003 46 523-30 1991 35 1-11 2014 289 623-9 2006 16 307-12 2012 27 1368-74 World Health Organization 2015 2009 49 1350-7 2014 82 499-508 2014 82 261-7 2007 3 1-7 2012 118 236-8 2011 113 229-34 2014 82 261-7 2003 3 160-4 2012 117 40-4 2012 117 40-4 2012 27 1368-74 2014 40 2104-9 2002 76 159-63 2002 76 159-63