[1] Univ Oulu, Fac Med, Res Unit Nursing Sci & Hlth Management, POB 5000, Oulu 90014, Finland
[2] Kajaani Univ Appl Sci, Kajaani, Finland
[3] Tampere Univ, Fac Med & Hlth Technol, Tampere, Finland
[4] Tampere Univ Hosp, Palliat Care Ctr, Tampere, Finland
[5] Tampere Univ Hosp, Dept Oncol, Tampere, Finland
[6] Oulu Univ Hosp, Med Res Ctr Oulu, Oulu, Finland