2413-4341 2413-4341 S2413-43412019000200039 10.18004/rpr/2019.05.02.39-42 España España 00 12 2019 00 12 2019 5 2 39 42 1 2018 68 394-424 2 2016 15 4 4 502-11 3 2011 3 2 2 213-27 4 2016 107 10 10 1373-9 5 2016 917 11-22 6 2017 27 1 1 11-37 7 2013 2 5 5 8 2002 3 11 11 991-8 9 1985 313 23 23 1485-92 10 2013 121 23 23 4694-702 11 1976 116 2 2 180-3 12 World Health Organization 13 MLA style 2019 14 2019 15 2013 31 16 2014 32 17 2015 372 4 4 311-9 18 2016 16 5 5 275-87 19 20 2018 2 1 1 21 2017 1-15 22 2019 7 1 1 235 23 2010 34 ^s1 ^s1 1 12-5