Funding for this research was provided by:
ORIGINBEDS S.L. (Nº53-2018)
Received: 12 June 2020
Accepted: 2 November 2020
First Online: 23 November 2020
Ethics approval and consent to participate
: The study design, which was approved by the Human Ethics Committee of the 12 de Octubre Hospital of Madrid, was explained to the participants, and written consent was obtained from each.
: Not applicable.
: The authors declare no conflict of interest.