[1
]
Faculty of Health- and Sport Sciences, University of Agder, P.O Box 422, 4604, Kristiansand,
Norway. Kristin.haraldstad@uia.no.
[2
]
Department of Health Sciences, University of Oslo, P.O. Box 1084, Blindern, 0317,
Oslo, Norway.
[3
]
Faculty of Health, OsloMet - Oslo Metropolitan University, St. Olavs plass, P.O. Box
4, 0130, Oslo, Norway.
[4
]
Department of Health and Caring Sciences, Western Norway University of Applied Sciences
(HVL), P.O. Box 7030, 5020, Bergen, Norway.
[5
]
Faculty of Health Sciences, UiT The Arctic University of Norway, P.O. Box 6050, Langnes,
Tromsø, Norway.
[6
]
University Hospital of North Norway, P.O. Box 100, 9038, Tromsø, Norway.
[7
]
Faculty of Health Studies, VID Specialized University, Mailbox 184, Vinderen, NO,
0319, Norway.
[8
]
Faculty of Health Sciences, University of Stavanger, P.O. Box 8600, Forus, Norway.
[9
]
Department of Public Health and Primary Care, University of Leuven, P.O. Box 7001,
Kapucijnenvoer, 3000, Leuven, Belgium.
[10
]
Haukeland University Hospital, P.O. Box 1400, 5021, Bergen, Norway.
[11
]
Faculty of Health- and Sport Sciences, University of Agder, P.O Box 422, 4604, Kristiansand,
Norway.
[12
]
Department of Clinical Research, SSHF, P.O. Box 416, 4604, Kristiansand, Norway.