- High-density single-nucleotide polymorphism (SNP) map in the 96-kb region containing the entire human DiGeorge syndrome critical region 2 (DGCR2) gene at 22q11.2. Iida, A., Ohnishi, Y., Ozaki, K., Ariji, Y., Nakamura, Y., Tanaka, T. J. Hum. Genet. (2001)