Funding for this research was provided by:
Universität Stuttgart
Article History
Received: 15 April 2021
Accepted: 6 October 2021
First Online: 1 November 2021
Declarations
:
: N. Schott, B. Johnen and T. J. Klotzbier declare that they have no competing interests.
: All assessments were conducted in accordance with ethical rules for research in human subjects following the Declaration of Helsinki (WMA, CitationRef removed). The local ethics committee approved the study. All nursing home residents or their legal guardians received written and verbal information about the study and signed informed consent before their participation.