CHAF1A and astrocytoma (excluding glioblastoma): In the astrocytoma subgroup, the CHAF1A block (rs243341, rs105038, rs243356, and rs2992) with three haplotypes with frequency of >1% was found; however, the distribution of haplotypes in this haploblock was not significantly different between patients and controls (χ2 = 2.95, df = 2, p = 0.229).