Funding for this research was provided by:
Instituto de Salud Carlos III (PI11/02219, PI16/01395)
Received: 8 February 2019
Accepted: 18 June 2019
First Online: 17 July 2019
Ethics approval and consent to participate
: The present study was reviewed and approved by the Clinical Research Ethics Committee from Galicia, Spain (CEIC2012–025). Written informed consent was obtained from each participant in the study, which conformed to the current Helsinki Declaration.
: Not applicable.
: The authors declare that they have no competing interests.