1. Institute of Health and SocietyUniversity of Oslo Oslo Norway
2. The National Centre for Occupational Rehabilitation in Norway Rauland Norway
3. Department of OncologyUniversity Hospital of North Norway Tromsø Norway
4. Institute of Clinical MedicineUIT‐The Arctic University Tromsø Norway
5. Department of Biostatistics, Oslo Centre for Biostatistics and EpidemiologyUniversity of Oslo Oslo Norway
6. Genetic Epidemiology, Department of Internal MedicineUniversity of Utah School of Medicine Salt Lake City UT USA
7. Finance Norway Oslo Norway