Received: 7 October 2019
Accepted: 7 July 2020
First Online: 12 August 2020
Ethics approval and consent to participate
: The study was approved by the Regional Ethical Review Board in Gothenburg Sweden (registration number 041–09; T503–14). Regional Ethical Review Board, Guldhedsgatan 5a, 413 20 Göteborg, Sweden.Written informed consent was obtained from all participants included in the study.
: Not Applicable.
: The authors declare that they have no competing interests.