Funding for this research was provided by:
University of Gothenburg
Received: 4 March 2021
Accepted: 18 August 2021
First Online: 3 September 2021
: This study conforms to the principles outlined in the Declaration of Helsinki. All participants were given written and oral information about the purpose of the study, the confidentiality and the voluntary nature of participation, and their right to withdraw from the study at any time. Informed consent was obtained from all participants. Ethical approval was obtained from the Regional Ethical Committee for Medical Research in Gothenburg (DNR 903–13, T403-15, T975-14.
: Not applicable.
: No conflict of interest was reported by the authors.