1 Department of Psychology, University of Oslo, Norway; Department of Community Medicine, UiT The Arctic University of Norway, Tromsø, Norway. Electronic address: olena.iakunchykova@psykologi.uio.no.
2 Department of Public Health, University of Copenhagen, Denmark.
3 Department of Psychology, University of Oslo, Norway; Department of Non-communicable Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, UK.