Funding for this research was provided by:
Spanish Ministry of Health and Carlos III Health Institute (EIPT-VHC)
Carlos III Institute of Health with the European Regional Development Fund (CM17/00095, INT17/00066)
Text and Data Mining valid from 2019-01-21
Accepted: 11 January 2019
First Online: 21 January 2019
Compliance with ethical standards
: RJ and JC have received research grants from Carlos III Institute of Health with the European Regional Development Fund, during the conduct of the study (CM17/00095, INT17/00066). IMB, AO, MS and RSM declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.