Funding for this research was provided by:
Instituto de Salud Carlos III (PI16/02124, PI12/00329, RD12/0009/0018)
Xunta de Galicia (IN607A 2017/11)
Received: 2 March 2019
Revised: 17 October 2019
Accepted: 21 October 2019
First Online: 16 November 2019
Compliance with ethical standards
: The funders did not contribute to data collection, analysis or interpretation of the data, manuscript preparation, or submission.
: The authors declare that they have no conflict of interest.