1. CureCancer PC, Anastaseos 23, 15561 Athens, Greece
2. Β’ Propaideytiki Pathology Clinic, Peripheral General Hospital of Athens, Oncology Department, “Attikon” School of Medicine, National and Kapodistrian University of Athens, 12461 Athens, Greece
3. Oncology Department, 401 General Military Hospital, 11525 Athens, Greece
4. Clinic of Oral Surgery, School of Dentistry, National and Kapodistrian University of Athens, 11527 Athens, Greece
5. 4th Oncology Dept & Comprehensive Clinical Trials Center, Metropolitan Hospital, 18547 Athens, Greece
6. Clinic of Oral Diagnosis and Radiology, School of Dentistry, National and Kapodistrian University of Athens, 11527 Athens, Greece
7. Oncology Clinic, Mitera Hospital, 15123 Athens, Greece
8. 3rd Pathology Oncology Clinic, Hygeia Hospital, 15123 Athens, Greece
9. 1st Medical Oncology Department, Euroclinic of Athens, 11521 Athens, Greece
10. Medical Oncology Clinic, 251 Hellenic Air Force General Hospital, 11527 Athens, Greece
11. 2nd Pathology Oncology Clinic, Hygeia Hospital, 15123 Athens, Greece
12. 4th Pathology Oncology Clinic, Hygeia Hospital, 15123 Athens, Greece
13. ENT Clinic, Hippokration Hospital, School of Medicine, National and Kapodistrian University of Athens, 11527 Athens, Greece
14. Bank of Cyprus Oncology Center, 2006 Nicosia, Cyprus
15. Clinical Trials Unit, 2nd Oncology Department, Henry Dunant Hospital Center, 11526 Athens, Greece
16. IASO Clinic, 3rd Medical Oncology Department, 15123 Athens, Greece
17. 2nd Oncology Clinic, Agios Savvas Hospital, 10447 Athens, Greece
18. 3rd Pathology Clinic, General Hospital for Thoracic Diseases of Athens “Sotiria”, School of Medicine, National and Kapodistrian University of Athens, 11527 Athens, Greece