Funding for this research was provided by:
Instituto de Salud Carlos III (PI18/00037)
Text and Data Mining valid from 2020-04-06
Received: 13 December 2019
Accepted: 24 March 2020
First Online: 6 April 2020
Ethics approval and consent to participate
: The study has been carried out in accordance with the guidelines of Declaration of Helsinki, and the corresponding hospital ethics committees approved the study; written informed consent was obtained from all participants before entering the study.
: All the authors approved the manuscript and consented for publication.
: The authors declare that they have no competing interests.