[1] Oslo Univ Hosp, Div Emergencies & Crit Care, Dept Pain Management & Res, Oslo, Norway
[2] Univ Oslo, Dept Psychol, Fac Social Sci, Oslo, Norway
[3] CatoSenteret Rehabil Ctr, Son, Norway
[4] Norwegian Univ Sci & Technol, Dept Circulat & Med Imaging, Fac Med & Hlth Sci, Trondheim, Norway
[5] Norwegian Univ Sci & Technol, Dept Publ Hlth & Nursing, Fac Med & Hlth Sci, Trondheim, Norway
[6] Norwegian Labour & Welf Adm, Oslo, Norway
[7] Norwegian Univ Sci & Technol, Fac Social & Educ Sci, Dept Psychol, Trondheim, Norway