Funding for this research was provided by:
Instituto de Salud Carlos III (PI16/00078)
Text and Data Mining valid from 2018-11-07
Received: 19 June 2018
Accepted: 16 October 2018
First Online: 7 November 2018
Compliance with ethical standards
: Participation was voluntary and written informed consent was obtained from all participants prior to enrollment. The study was conducted in accordance with the Declaration of Helsinki and was approved by the Sant Pau Hospital Ethics Committee.
: The authors declare that they have no conflict of interest.