Funding for this research was provided by:
Instituto de Salud Carlos III (PI18/01676)
Received: 21 October 2020
Accepted: 30 October 2020
First Online: 17 November 2020
Ethics approval and consent to participate
: This protocol was approved by the A Coruña-Ferrol Research Ethics Committee (ID: 2020–090). For the prospective sub-study, if participants who meet the eligibility criteria wish to take part in the study after they have been informed about its procedures, they will be asked to sign an informed consent form.
: Not applicable: No data from any individual person were included in this manuscript.
: The authors declare that they have no competing interests.