1. 1Department of Oncology, Helsinki University Hospital and University of Helsinki, Helsinki, Finland.
2. 2Gerhard-Domagk-Institute of Pathology, University of Münster, Münster, Germany.
3. 3Department of Oncology, Skåne University Hospital and Lund University, Lund, Sweden.
4. 4Helios Klinikum Berlin-Buch, Sarkomzentrum Berlin-Brandenburg, Berlin, Germany.
5. 5Department of Oncology, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway.
6. 6Alfried Krupp Krankenhaus, Essen Rüttenscheid, Germany.
7. 7Department of Gastroenterology, University of Göttingen, Göttingen, Germany.
8. 8Division of Surgical Oncology & Thoracic Surgery, Mannheim University Medical Center, Mannheim, Germany.
9. 9Department of Pathology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.
10. 10Medical Department III, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany.
11. 11Department of Medicine III, University Hospital, LMU Munich, Munich, Germany.
12. 12Sarcoma Center, West German Cancer Center, Essen, Germany.
13. 13Department of Surgery, Sahlgrenska University Hospital, Gothenburg, Sweden.
14. 14Department of Oncology and Radiotherapy, Oulu University Hospital, Oulu, Finland.
15. 154Pharma Ltd, Turku, Finland.