Prognostic Significance of MGMT Promoter Methylation in Patients with Glioblastoma Undergoing Surgical Intervention: A Retrospective Study in Northeastern Iran Journal title: Middle East Journal of Cancer Authors: Kazem Anvari, Mehdi Seilanian Toussi, Hossein Ayatollahi, Gholamreza Bahadorkhan, Mohammadreza Ghava... Subject(s):