Funding for this research was provided by:
Received: 20 August 2020
Accepted: 12 April 2021
First Online: 23 April 2021
: The study was approved by the Regional Ethics Review Board in Linköping, Sweden (Peolsson, Dnr 2016/135–31 and 2018/462–32). Participants provided written informed consent, and were informed that participation was on voluntary basis and that they could withdraw from the study at any time. Confidentiality was guaranteed.
: Not applicable.
: The authors have no competing interests to declare.