1. Fican West Cancer Centre, Department of Oncology and Radiotherapy, University of Turku, Turku, Finland;
2. Turku University Hospital, Turku, Finland;
3. Department of Oncology and Radiotherapy, Tampere University Hospital, Tampere, Finland;
4. Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland;
5. Center of Oncology, Kuopio University Hospital, Kuopio, Finland;
6. Department of Oncology and Radiotherapy, University of Oulu and Oulu University Hospital, Oulu, Finland;
7. HYKS Cancer Center, University of Helsinki and Helsinki University Hospital, Helsinki, Finland