[1] Oslo Univ Hosp, Dept Phys Med & Rehabil, PO 4950 Nydalen, N-0424 Oslo, Norway
[2] Univ Oslo, Dept Psychol, Fac Social Sci, Oslo, Norway
[3] Sunnaas Rehabil Hosp, Dept Res, Nesoddtangen, Norway
[4] Univ Oslo, Inst Hlth & Soc, Ctr Habilitat & Rehabil Models & Serv, Fac Med, Oslo, Norway
[5] Oslo Metropolitan Univ, Dept Occupat Therapy Prosthet & Orthot, Fac Hlth Sci, Oslo, Norway
[6] Oslo Metropolitan Univ, Dept Physiotherapy, Fac Hlth Sci, Oslo, Norway
[7] Oslo Univ Hosp, Ctr Rare Disorders, Oslo, Norway
[8] Villanova Univ, M Louise Fitzpatrick Coll Nursing, Villanova, PA 19085 USA
[9] Norwegian Univ Sci & Technol, Dept Hlth Sci Gjovik, Fac Med & Hlth Sci, Gjovik, Norway
[10] Oslo Univ Hosp, Oslo Ctr Biostat & Epidemiol, Oslo, Norway
[11] Univ Oslo, Inst Clin Med, Fac Med, Oslo, Norway