*Institute of Clinical Medicine, Campus Ahus, Oslo, Olso, Norway
†HØKH, Research Centre, Akershus University Hospital, Lørenskog, Norway
‡Department of Behavioural Sciences, Institute of Basal Medical Sciences, University of Oslo, Olso, Norway
§Department of Psychology, Northeastern University, Boston, MA
Collection of the data on which this study is based was funded by the Regional Health Enterprise of the southeast region of Norway. No external funding was received for this particular analysis.
The authors declare no conflict of interest.
Reprints: Pål Gulbrandsen, MD, PhD, Mail drawer 95, Akershus University Hospital, 1478 Lørenskog, Norway. E-mail: [email protected].