[1] VAMK Univ Appl Sci, Dept Social & Hlth Care, Wolffintie 27-31, Vaasa 65200, Finland
[2] Kajaani Univ Appl Sci, Sch Hlth, PL 52,Ketunpolku 4, Kajaani 87101, Finland
[3] Univ Helsinki, Fac Med, Helsinki, Finland
[4] Helsinki Univ Hosp, Canc Ctr, PL 180, Helsinki 00029, Finland
[5] Tampere Univ, Fac Med & Hlth Technol, Tampere, Finland
[6] Tampere Univ Hosp, Dept Oncol, Palliat Care Unit, Teiskontie 35,R Bldg, Tampere 33520, Finland