1. Department of Oncology, Clinical Hospital Center Split, School of Medicine, University of Split, Split, Croatia
2. Department of Oncology, St. László Teaching Hospital, Budapest, Hungary
3. Medical University of Gdańsk, Gdańsk, Poland
4. Department of Medical Oncology, Tumor Center Aarau, Aarau, Switzerland
5. 2nd Department of Oncology, Faculty of Medicine, Comenius University, Bratislava, Slovak Republic
6. National Cancer Institute, Bratislava, Slovak Republic
7. Division of Oncology and Hematology, Department of Medicine I, Medical University of Vienna, Austria
8. University Clinic Golnik, Golnik, Slovenia
9. Institute of Oncology, Clinical Center, University of Sarajevo, Sarajevo, Bosnia and Herzegovina
10. Department of Breast Tumors, Cancer Institute “Prof. Dr. I. Chiricuta” Cluj-Napoca, Romania
11. Oncology and Radiotherapy Clinic, Clinical Centre of Montenegro, Podgorica, Montenegro
12. Department of Oncology, University Hospital Motol, Charles University, Prague, Czech Republic
13. National Hospital of Oncology, Sofia, Bulgaria
14. Daily Chemotherapy Hospital, Institute for Oncology and Radiology of Serbia, Belgrade, Serbia
15. Oncology Institute, University Hospital Center Mother Teresa, Tirana, Albania
16. Institute of Radiotherapy and Oncology, Skopje, Macedonia
17. Biometrika Healthcare Research, Zagreb, Croatia
18. Oncology Division, Department of Medicine, Stanford University School of Medicine, Stanford, California, USA