1134-8046 1134-8046 S1134-80462019000200003 10.20986/resed.2019.3735/2019 España 00 04 2019 00 04 2019 26 2 70 71 2012 15 4 4 E363-404 2019 2012 4 3 3 137-47 2015 122 5 5 974-84