An Independent Validation of 2010 Tumor-Node-Metastasis Classification for Renal Cell Carcinoma: A Multi-center Study by the Urooncology Association of Turkey Renal Cancer-Study Gr... oleh Tayyar Alp Özkan, Saadettin Eskiçorapçı, Özgür Yaycıoğlu, Bülent Akdoğan, Çağatay Göğüs, Ayhan Dirim, Cavit Can, Asıf Yıldırım, Haluk Özen, Levent Türkeri, Urooncology Association of Turkey Renal Cancer-Study Group