[1] Haukeland Hosp, Dept Thorac Med, Bergen, Norway
[2] Univ Bergen, Dept Clin Sci, Bergen, Norway
[3] Stavanger Univ Hosp, Dept Pulm Med, Stavanger, Norway
[4] Univ Oslo, Inst Clin Med, Fac Med, Oslo, Norway
[5] Akershus Univ Hosp, Hlth Serv Res Unit HOKH, Nordbyhagen, Norway
[6] Univ Bergen, Ctr Study Sci & Humanities, Bergen, Norway
[7] Haugesund Hosp, Dept Pulm Med, Haugesund, Norway
[8] Forde Hosp, Dept Med, Forde, Norway
[9] Univ Bergen, Bergen Ctr Eth & Prior Setting, Bergen, Norway
[10] Haukeland Hosp, Dept Thorac Med, Jonas Liesvei 65, N-5021 Bergen, Norway