Seglem, K. B. http://orcid.org/0000-0002-7106-9166
Ørstavik, R.
Torvik, F. A.
Røysamb, E.
Vollrath, M.
Funding for this research was provided by:
Research Council of Norway (237999, 288083, 262700)
Article History
Received: 10 July 2020
Accepted: 21 October 2020
First Online: 11 November 2020
Ethics approval and consent to participate
: The study was approved by the Regional Committees for Medical and Health Research Ethics (reference number: 2015/405 REK sør-øst D). Written informed consent was obtained from participants born 1967–1979. For participants born 1948–1960 an exemption from the duty of confidentiality, cf. the Norwegian Health Research Act, was approved by the Regional Committees for Medical and Health Research Ethics.
: Not applicable.
: The authors declare that they have no competing interests.