[1] Vestre Viken HF, Qual Dept, Drammen, Buskerud, Norway
[2] Univ Oslo, Inst Hlth & Soc, Fac Med, Oslo, Norway
[3] Univ Oslo, Inst Hlth & Soc, Clin Effectiveness Res Grp, Oslo, Norway
[4] Oslo Univ Hosp, Dept Transplantat Med, Oslo, Norway
[5] Oslo Univ Hosp, KG Jebsen Ctr Colorectal Canc Res, Oslo, Norway
[6] Oslo Univ Hosp, Norwegian Natl Advisory Unit Trauma, Div Emergencies & Crit Care, Oslo, Norway
[7] Haukeland Hosp, Dept Anaesthesia & Intens Care, Bergen, Norway
[8] Vestre Viken HF, Dept Gen & Orthoped Surg Obstet Anaesthesia & Int, Ringerike Hosp, Drammen, Buskerud, Norway
[9] Vestre Viken HF, Div Mental Hlth & Addict, Ringerike DPS, Drammen, Buskerud, Norway
[10] Municipal Ringerike, Dept Med, Honefoss, Buskerud, Norway
[11] Ostfold Hosp, Dept Pulm Dis, Kalnes, Ostfold, Norway
[12] Municipal Porsgrunn, Dept Med, Porsgrunn, Norway
[13] Nordland Hosp, Dept Med, Lofoten, Nordland, Norway
[14] Norwegian Federat Org Disabled People, Oslo, Norway
[15] South Eastern Norway Reg Hlth Author, Dept Qual Med & Patient Safety, Hamar, Norway
[16] Geisel Sch Med Dartmouth, Dartmouth Inst Hlth Policy & Clin Practice, Lebanon, NH USA
[17] Univ Oslo, Dept Family Med, Fac Med, Inst Hlth & Soc, Oslo, Norway