[1] Norwegian Univ Sci & Technol, Dept Publ Hlth & Nursing, Fac Med & Hlth Sci, PB 8905 MTFS, N-7491 Trondheim, Norway
[2] St Olavs Univ Hosp, Dept Phys Med & Rehabil, Trondheim, Norway
[3] St Olavs Univ Hosp, Hysnes Rehabil Ctr, Trondheim, Norway
[4] Norwegian Univ Sci & Technol, Dept Mental Hlth, Fac Med & Hlth Sci, Trondheim, Norway