Received: 4 September 2020
Accepted: 13 December 2020
First Online: 29 December 2020
Ethics approval and consent to participate
: This study was approved by the Regional Ethics Committee in Gothenburg, Sweden (Dnr 976–16). All participants were informed that returning the answered questionnaire was regarded as informed consent to participate in the study. All questionnaires were completely anonymous and data could not be traced back to the individual participants.
: Not applicable.
: The authors declare that they have no competing interests.