1137-6627 1137-6627 S1137-66272019000100021 10.23938/assn.0589 Spain 00 04 2019 00 04 2019 42 1 121 124 2016 39 319-22 2011 34 463-9 2009 19 280-3 2013 21 595-603 2010 19 103-32 2016 18 151 2013 1 195-212 1996 11 11-8 2016 30 93-8 2015