Bekkelund, Svein Ivar http://orcid.org/0000-0002-8464-7199
Article History
Received: 23 September 2020
Accepted: 14 December 2020
First Online: 13 January 2021
Ethics approval and consent to participate
: The Tromsø study was approved by the Norwegian Committee for Medical and Health Research Ethics (REC), reference number 121/2006. All participants in The Tromsø Study have given informed written consent.
: Not applicable.
: The author declares that there is no conflict of interest related to the study.