Received: 5 October 2021
Accepted: 20 December 2021
First Online: 10 January 2022
: The Regional Ethical Committee for Medical and Health Research for Southern Norway (2013/1664/REK sør øst D) approved the study. All methods were carried out in accordance with relevant guidelines and regulations. The participants were all given a written information form and the nature of the study was explained to them. Those who wanted to participate were given a consent form to sign and informed that they would have the right to withdraw at any time. Informed consent was obtained from all subjects.
: Not applicable.
: The authors declare that they have no competing interest.