[1] Inland Norway Univ Appl Sci, Fac Social & Hlth Sci, Dept Hlth & Nursing Sci, PB 400, N-2418 Elverum, Norway
[2] UIT Arctic Univ Norway, Fac Hlth Sci, Dept Hlth & Care Sci, Tromso, Norway
[3] Oslo Univ Hosp, Dept Geriatr Med, Oslo, Norway
[4] Univ Oslo, Fac Med, Dept Nursing Sci, Oslo, Norway
[5] Univ Oslo, Fac Med, Res Ctr Habilitat & Rehabil Serv & Models CHARM, Oslo, Norway
[6] Oslo Univ Hosp, Dept Geriatr Med & Phys Med & Rehabil, Oslo, Norway