aDivision of Mental Health, Norwegian Institute of Public Health, Bergen and Oslo, Norway
bRegional Centre for Child and Youth Mental Health and Child Welfare, Uni Research Health, Bergen, Norway
cDepartment of Psychiatry, Helse Fonna HF, Haugesund, Norway
dFinnish Institute of Occupational Health, Helsinki, Finland
eDepartment of Public Health, University of Helsinki, Helsinki, Finland
fDepartment of Psychological Medicine, University of Auckland, Auckland, New Zealand
gDepartment of Health Statistics, Division of Epidemiology, Norwegian Institute of Public Health, Oslo, Norway
hDepartment of Pain Management and Research, Oslo University Hospital, Oslo, Norway
iInstitute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
Corresponding author. Address: Division of Mental Health, Norwegian Institute of Public Health, Kalfarveien 31, 5018 Bergen, Norway. Tel.: +47 53204101. E-mail address: [email protected] (B. Sivertsen).
Sponsorships or competing interests that may be relevant to content are disclosed at the end of this article.
Received December 04, 2014
Received in revised form January 28, 2015
Accepted February 03, 2015