1. Department of Medical Oncology, University of Ioannina, Ioannina, Greece
2. Society for Study of Clonal Heterogeneity of Neoplasia (EMEKEN), Ioannina, Greece
3. Third Department of Medical Oncology, Agii Anargiri Cancer Hospital, Athens, Greece
4. Section of Biostatistics, Hellenic Cooperative Oncology Group, Data Office, Athens, Greece
5. Laboratory of Molecular Oncology, Hellenic Foundation for Cancer Research, Aristotle University of Thessaloniki, Thessaloniki, Greece
6. Second Department of Medical Oncology, Agii Anargiri Cancer Hospital, Athens, Greece
7. Department of Pathology, Ioannina University Hospital, Ioannina, Greece
8. Department of Pathology, Papageorgiou Hospital, Aristotle University of Thessaloniki, School of Health Sciences, Faculty of Medicine, Thessaloniki, Greece
9. Second Department of Internal Medicine, Agios Savvas Cancer Hospital, Athens, Greece
10. Department of Pathology, Agii Anargiri Cancer Hospital, Athens, Greece
11. Section of Medical Oncology, Department of Internal Medicine, Attikon University Hospital, Faculty of Medicine, National and Kapodistrian University of Athens School of Medicine, Athens, Greece
12. Division of Oncology, Department of Medicine, University Hospital, University of Patras Medical School, Patras, Greece
13. Department of Pathology, Metropolitan Hospital, Piraeus, Greece
14. Oncology Section, Second Department of Internal Medicine, Hippokration Hospital, Athens, Greece
15. Aristotle University of Thessaloniki, Thessaloniki, Greece
16. German Oncology Center, Limassol, Cyprus