Funding for this research was provided by:
Received: 18 June 2021
Accepted: 16 November 2021
First Online: 22 January 2022
: The study was approved by the Regional Ethical Review Board in Umeå, Sweden (registration number 07-028 M  and 2012-464-31 M ) and performed in accordance with the ethical principles stated in the Declaration of Helsinki. An opt-out consent procedure was utilized in the present study. Written information was provided to all participants and posters with information about the study was available by the entrance of the nursing homes. Residents and their relatives could decline to participate if they did not want to participate in the study.
: Not applicable.
: The authors declare that they have no competing interests.