Funding for this research was provided by:
Instituto de Salud Carlos III (Foundation for Biomedical Research of the University Hospital of Getafe, Spain (COVID-19 No.ISCIII:COV20/00977, 2020. Madrid (0010604))
Received: 23 April 2021
Accepted: 16 September 2021
First Online: 2 October 2021
: This study was conducted following approval from the ethics committee of each study site. A waiver of consent was obtained from all participants or their representative (<i>Hospital Universitario de Getafe CEIm</i>, registry number#20/06, April 15 2020).
: Not applicable.
: The authors declare that they have no competing interests.