[1] Vaasa Cent Hosp, Wellbeing Serv Cty Ostrobothn, Dept Oncol, Hietalahdenkatu 2 4, Vaasa 65100, Finland
[2] Univ Helsinki, Comprehens Canc Ctr, Dept Oncol, Helsinki, Finland
[3] Helsinki Univ Hosp, Comprehens Canc Ctr, Dept Radiotherapy, Helsinki, Finland
[4] Univ Turku, Dept Biostat, Turku, Finland
[5] Turku Univ Hosp Turku, Turku, Finland
[6] Turku Univ, Dept Oncol, Vaasa, Finland
[7] Turku Univ Hosp, Tyks Hosp Serv, Palliat Ctr, Turku, Finland
[8] Univ Turku, Dept Gen Med, Turku, Finland
[9] Univ Helsinki, Helsinki Univ Hosp, Comprehens Canc Ctr, Dept Palliat Care, Helsinki, Finland
[10] Univ Helsinki, Fac Med, Helsinki, Finland