1. Medical Oncology Department, Firat University Hospital, Elazig, Turkey
2. Medical Oncology Department, Institute of Oncology, Istanbul University, Capa, Istanbul, Turkey
3. Agri Hamur State Hospital, Internal Medicine Clinic, Hamur, Agri, Turkey
4. Biochemistry Department, Institute of Oncology, Istanbul University, Capa, Istanbul, Turkey
5. Medical Oncology Department, Bedii Gorbon Oncology Center, Avrupa Florence Nightingale Hospital, Sisli, Istanbul, Turkey