Received: 5 October 2019
Accepted: 4 June 2020
First Online: 15 June 2020
Ethics approval and consent to participate
: Eligible older people received an invitation letter by post and were contacted by telephone to provide verbal informed consent to participate in the study. A registered nurse made home visits to obtain written informed consent and to collect data. The present study complies with the Declaration of Helsinki and was approved by the Regional Ethics Committee in Linköping (Regionala Etikprövningsnämnden i Linköping), Sweden (Dnr 2012/244–32).
: In the written informed consent, participants also consent to publish the obtained data.
: The authors declare that they have no competing interests.