1137-6627 1137-6627 S1137-66272020000200019 10.23938/assn.0865 España España 00 08 2020 00 08 2020 43 2 273 276 1 2014 2 2017 92 1114-20 3 2016 12 268-74 4 2019 20 52-8 5 2019 76 62-7 6 2019 16 4646 7 2017 44 85-91 8 2017