1. Department of Oncology and Radiotherapy, Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
2. Department of Oncology and Radiotherapy, Tampere University Hospital, Tampere, Finland
3. Faculty of Medicine and Health Technology, Tampere Cancer Center, Tampere University, Tampere, Finland
4. Department of Oncology, Helsinki University Hospital Comprehensive Cancer Centre and University of Helsinki, Helsinki, Finland