Funding for this research was provided by:
Received: 19 October 2020
Accepted: 1 February 2021
First Online: 11 March 2021
Ethics approval and consent to participate
: The study protocol conforms to the ethical guidelines of the 1975 Declaration of Helsinki and was approved by the Regional Ethics Review Board, Uppsala, ref 2014/224. Written and informed consent was obtained from each participant included in the study.
: Not applicable.
: None of the authors has a conflict of interest or financial or other relationships that might lead to a conflict of interest.