... normalbraintissuesample1;NB2,normalbraintissuesample2;GBIV, WHO grade IV glioblastoma; E/G, mean ratio of densitometry values of EGFR and GAPDH amplificationbands. P/G, mean ratio of densitometry values of PTEN and GAPDH amplification ... Organisation for Research and Trea tment of Cancer BrainTumor and Radiotherapy, Groups, National Cancer Institute of Canada Clinical Trials G roup: Radiotherapy plus concomitant and adjuvant temo zolomide ... temozolomide-resistant glioma cellsAnnalisa Lena1,MariarosaRechichi1, Alessandra Salvetti1, Barbara Bartoli1,Donatella Vecchio1, Vittoria Scarcelli1,RosinaAmoroso2, Lucia Benvenuti2,Rolando...