Astrocytoma|Chromosome Deletion|Chromosomes, Human, Pair 1|Chromosomes, Human, Pair 17|Computer Simulation|DNA Copy Number Variations|Genome-Wide Association Study|Glioma|High-Throughput Nucleotide Sequencing|Humans|Isocitrate Dehydrogenase|Loss of Heterozygosity|Polymorphism, Single Nucleotide|Sequence Analysis, DNA|Software