Acknowledgments
We thank all hospital COVID-19 teams for the protocol developments and updates, Sociedad Andaluza de Medicina Interna for the coordination, and Claire Conrad for her help with the final English-language version.

Author Contributions
L.M.P.-B., conceptualization, methodology, formal analysis, data curation, writing—original draft preparation, writing—review and editing, supervision; M.D.L.-C. and J.L.Q.-M., formal analysis, data curation, writing—original draft preparation, writing—review and editing; M.R., J.M.-C., and A.L.-S., writing—original draft preparation, writing—review and editing; M.R., J.M.-C., and J.S.-C., data curation, writing—original draft preparation; M.D.M.-E. and M.R.B.-L., and R.G.-H., writing—original draft preparation, writing—review and editing, supervision. All authors have read and agreed to the published version of the manuscript.

Funding
This work did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

Conflicts of Interest
The authors declare no conflict of interest.