1. Hospital for Rheumatic Diseases; M. Grundvigsvei 6; 2609; Lillehammer; Norway
2. Norwegian Centre for Violence and Traumatic Stress Studies; Kirkeveien 146, Building no. 48; 0407; Oslo; Norway
3. National Resource Centre for Rehabilitation in Rheumatology, Department of Rheumatology; Diakonhjemmet Hospital; Boks 23, Vinderen; 0319; Oslo; Norway