RELATION BETWEEN LUMBAR DEGENERATIVE DISC DISEASE AND HUMAN 8-HYDROXYDEOXYGUANOSINE (8-OHDG) SERUM LEVEL Journal title: Journal of Turkish Spinal Surgery Authors: Seda Güleç YILMAZ, Cumhur Kaan YALTIRIK, Emre Murat ALTINKILIÇ, Turgay İSBIR Subject(s): Medicine, Surgery