Antineoplastic Agents/pharmacology; Cyclin-Dependent Kinase Inhibitor p16/genetics; Histocompatibility Antigens Class I/genetics; Membrane Proteins/genetics; Neoplasms/genetics; Polymorphism, Genetic; ATP Binding Cassette Transporter, Subfamily B, Member 1/genetics; ATP Binding Cassette Transporter, Subfamily B, Member 1/metabolism; Antineoplastic Agents/therapeutic use; Cell Cycle; Cell Line, Tumor; Cyclin-Dependent Kinase Inhibitor p16/metabolism; DNA Methylation; DNA Modification Methylases/genetics; DNA Modification Methylases/metabolism; DNA Repair Enzymes/genetics; DNA Repair Enzymes/metabolism; Dacarbazine/analogs & derivatives; Dacarbazine/pharmacology; Doxorubicin/pharmacology; Drug Resistance, Neoplasm/genetics; Gene Expression/drug effects; Gene Expression/radiation effects; Gene Expression Profiling; Glioma/drug therapy; Glioma/genetics; HSP72 Heat-Shock Proteins/genetics; Hemochromatosis Protein; Humans; NAD(P)H Dehydrogenase (Quinone)/genetics; NAD(P)H Dehydrogenase (Quinone)/metabolism; Neoplasms/drug therapy; Promoter Regions, Genetic; Radiation Tolerance/genetics; Temozolomide; Tumor Suppressor Proteins/genetics; Tumor Suppressor Proteins/metabolism