Funding for this research was provided by:
FIS (Fondo de Investigaciones Sanitarias—Health Research Fund, Instituto de Salud Carlos III) and co-financed by the European Union through the Fondo Europeo de Desarrollo Regional (PI20/00118)
Received: 16 April 2021
Accepted: 5 July 2021
First Online: 9 July 2021
: Not applicable.
: Not applicable
: The authors declare that there is no conflict of interest.