GlioblastomaBrain NeoplasmsDacarbazineAntineoplastic Agents, AlkylatingNeoplasm Recurrence, LocalDNA Modification MethylasesGliomaKarnofsky Performance StatusDNA Repair EnzymesO(6)-Methylguanine-DNA MethyltransferaseDisease-Free SurvivalAntibodies, Monoclonal, HumanizedKaplan-Meier EstimateAngiogenesis InhibitorsTreatment OutcomePrognosisSurvival RateCombined Modality TherapyMagnetic Resonance ImagingSurvival AnalysisCarmustineAstrocytomaDNA MethylationCamptothecinTumor Suppressor ProteinsTumor Markers, BiologicalCell Line, TumorAntineoplastic Combined Chemotherapy ProtocolsAntineoplastic AgentsDisease ProgressionQuinazolinesSalvage TherapyMaximum Tolerated DoseGene Expression Regulation, NeoplasticPromoter Regions, GeneticReceptor, Epidermal Growth FactorDrug Administration ScheduleAntibodies, MonoclonalRecurrenceFollow-Up StudiesPolymerase Chain ReactionRetrospective StudiesNeoplastic Stem CellsMice, Nude