[1] Univ Bergen, Dept Psychosocial Sci, Bergen, Norway
[2] Univ Bergen, Dept Clin Sci, Bergen, Norway
[3] Univ Bergen, Dept Clin Med, Dr Einar Martens Res Grp Biol Psychiat, Bergen, Norway
[4] Haukeland Hosp, Ctr Med Genet & Mol Med, N-5021 Bergen, Norway
[5] Haukeland Hosp, Norwegian Competence Ctr Sleep Disorders, N-5021 Bergen, Norway
[6] Univ Bergen, Dept Global Publ Hlth & Primary Care, Bergen, Norway
[7] Haukeland Hosp, Dept Occupat Med, N-5021 Bergen, Norway