1. Department of Investigational Cancer Therapeutics, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
2. Department of Pathology, Faculty of Medicine, School of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
3. Laboratory of Molecular Oncology, Hellenic Foundation for Cancer Research/Aristotle University of Thessaloniki, Thessaloniki, Greece
4. Section of Biostatistics, Hellenic Cooperative Oncology Group, Athens, Greece
5. Department of Medical Oncology, Papageorgiou Hospital, Faculty of Medicine, School of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
6. Department of Pathology, Papageorgiou Hospital, Thessaloniki, Greece
7. Oncology Section, Second Department of Internal Medicine, Hippokration Hospital, Athens, Greece
8. Department of Pathology, Konstantopouleio Agia Olga General Hospital, Athens, Greece
9. Oncology Department, General Hospital of Chania, Crete, Greece
10. Second Department of Medical Oncology, Metropolitan Hospital, Piraeus, Greece
11. Oncology Department, University General Hospital of Larissa, Larissa, Greece
12. Department of Surgery, University Hospital of Ioannina and School of Medicine, University of Ioannina, Greece
13. Division of Oncology, Second Department of Internal Medicine, Attikon University Hospital, Athens, Greece
14. Second Department of Medical Oncology, Agii Anargiri Cancer Hospital, Athens, Greece
15. Department of Pathology, Faculty of Medicine, University of Thessaly, Larissa, Greece
16. Department of Medical Oncology, Ioannina University Hospital, Ioannina, Greece
17. Aristotle University of Thessaloniki, Thessaloniki, Greece