1. Department of Oncology and Nuclear Medicine, University Hospital Center Sestre Milosrdnice, Zagreb, Croatia
2. Department of Medical Oncology, University Hospital for Tumors, University Hospital Center Sestre Milosrdnice, Zagreb, Croatia
3. Department of Internal Medicine, University Hospital Center Sestre Milosrdnice, Zagreb, Croatia
4. School of Dental Medicine, University of Zagreb, Zagreb, Croatia
5. Intensive Oncology and Supportive Care Department, Clinic For Medical Oncology, Institute for Oncology and Radiology of Serbia, Belgrade, Serbia
6. Acratus, Budapest, Hungary
7. Department of Internal Medicine and Oncological Chemotherapy, Medical University of Silesia, Katowice, Poland
8. Department of Oncology and Hematology, Hospital of Lithuanian University of Health Sciences, Kaunas, Lithuania
9. Department of Medical Oncology, Istanbul Medeniyet University, Istanbul, Turkey
10. Clinic of Oncology, University Hospital Mostar, Mostar, Bosnia and Herzegovina
11. Department of Medical Oncology, Euromedica General Clinic, Thessaloniki, Greece
12. Medical Oncology Unit, University Clinic Golnik, Golnik, Slovenia
13. Medical Oncology Department, Oncology Institute Prof. Dr. I. Chiricuta, Cluj-Napoca, Romania
14. Clinic for Oncology and Radiotherapy, Clinical Center of Montenegro, Podgorica, Montenegro
15. Department of Medical Oncology, University Hospital of Parma, Parma, Italy
16. Department of Medical Oncology, Multi Profile Hospital for Active Treatment Nadezhda, Sofia, Bulgaria
17. Department of Oncology, American Hospital Tirana II, Tirana, Albania
18. Outpatient Department, Clinical Scientifical Practical Center of Specialized Kinds of Medical Care (Oncology), Saint Petersburg, Russia
19. Division of Medical Oncology, Institute of Oncology Ljubljana, Ljubljana, Slovenia
20. Health Center “Zagreb Centar,” Zagreb, Croatia
21. Department of Gastroenterology and Hepatology, Clinical Hospital “Sveti Duh,” Zagreb, Croatia