1. Department of Psychosocial Science, University of Bergen, Bergen, Norway
2. Department of Biological and Medical Psychology, University of Bergen, Bergen, Norway
3. Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
4. Norwegian Competence Center for Sleep Disorders, Haukeland University Hospital, Bergen, Norway
5. Optentia Research Focus Arena, North-West University, Vanderbijlpark, South Africa