Martínez-Pérez, Alba María http://orcid.org/0000-0003-0837-7091
Álvarez-Salgado, Xosé Antón
Arístegui, Javier
Nieto-Cid, Mar http://orcid.org/0000-0001-7614-4076
Article History
Received: 3 April 2017
Accepted: 6 June 2017
First Online: 18 July 2017
Competing Interests
: The authors declare that they have no competing interests.