Gamarra, Roberto https://orcid.org/0000-0002-9789-1414
Ortúñez, Emma https://orcid.org/0000-0002-0504-6601
Galan Cela, Pablo https://orcid.org/0000-0002-5760-9509
Merencio, Ángela
Article History
Received: 30 October 2017
Accepted: 10 January 2018
First Online: 8 February 2018
Compliance with ethical standards
:
: All authors declare that they have no conflict of interest.