1. Oncology Unit, 2nd Department of Medicine, Medical School, Hippocratio General Hospital of Athens, National and Kapodistrian University of Athens, V. Sofias 114, 11527 Athens, Greece
2. Oncology Department, Bioclinic of Thessaloniki, 54622 Thessaloniki, Greece
3. Department of Surgical Oncology, University Hospital of Heraklion, 71110 Heraklion, Greece
4. Hematology Oncology Unit, Fourth Department of Internal Medicine, School of Medicine, National Kapodistrian University of Athens, 12462 Athens, Greece
5. Hellenic Oncology Research Group (HORG), 11526 Athens, Greece
6. Medical Oncology Unit, Department of Internal Medicine, School of Medicine, National and Kapodistrian University of Athens, 12462 Athens, Greece
7. Department of Oncology, 401 General Military Hospital of Athens, 11525 Athens, Greece
8. 2nd Department of Surgery, School of Medicine, Aretaieion Hospital, National and Kapodistrian University of Athens, 11528 Athens, Greece
9. Department of Orthopedic Oncology, “Agioi Anargyroi” General Hospital, 14564 N.Kifisia, Greece
10. Department of Radiation Oncology, “Iaso” Hospital, 15123 Marousi, Greece
11. Department of Tomotherapy-Stereotactic Radiosurgery “Iatropolis”, 15231 Chalandri, Greece
12. Department of Medical Oncology, University Hospital of Larissa, 41334 Larissa, Greece
13. Department of Medical Oncology, School of Medicine, Faculty of Health Sciences, Papageorgiou Hospital, Aristotle University of Thessaloniki, 56429 Thessaloniki, Greece
14. Hellenic Group of Sarcoma and Rare Cancers, G. Theologou 5, 11471 Athens, Greece
15. Oncology Unit, ST Andrews General Hospital of Patras, 26332 Patras, Greece
16. Division of Surgical Oncology and Thoracic Surgery, Mannheim University Medical Center, University of Heidelberg, 68167 Mannheim, Germany
17. Department of Surgical Oncology, Athens Medical Center, 15125 Athens, Greece
18. 1st Department of Orthopaedic Surgery, School of Medicine, National and Kapodistrian University of Athens, 12462 Athens, Greece
19. Oncology Department, Hygeia Athens Private Hospital, 15123 Maroussi, Greece
20. Department of Genetics, Saint Savvas Cancer Hospital, 11522 Athens, Greece
21. Unit of Bone and Soft Tissue Studies, Department of Histology and Histopathology, School of Medicine, University of Patras, 26504 Patras, Greece
22. Department of Pathology, School of Medicine, National and Kapodistrian University of Athens, 11527 Athens, Greece