Funding for this research was provided by:
Instituto de Salud Carlos III (RD16/0022/0007)
Received: 16 April 2019
Accepted: 28 August 2019
First Online: 11 October 2019
Ethics approval and consent to participate
: This study has been approved by the ethics committee of the institutional review board of Hospital General Universitario Gregorio Marañón. The approval number is 2010–022851-47. Written informed consent will be collected from each study participant prior to enrollment by the physician responsible for the patient. They will be made aware that participation is voluntary, and they will be allowed to refuse further participation in the trial whenever they want.
: Not applicable.
: The authors declare that they have no competing interests.