[1] Dr AY Ankara Oncol Training & Res Hosp, Dept Med Oncol, Ankara, Turkey
[2] Gazi Univ, Fac Med, Ankara, Turkey
[3] Ataturk Training & Res Hosp, Ankara, Turkey
[4] Erciyes Univ, Fac Med, Kayseri, Turkey
[5] Marmara Univ, Fac Med, Istanbul, Turkey
[6] Sakarya Univ, Training & Res Hosp, Sakarya, Turkey