Affiliation: | 1. Division of Genetics and Mutagenesis, National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan. 2. AGENE Research Institute, 200 Kajiwara, Kamakura. Kanagawa 247-0063, Japan. 3. Olympus Chromosome Research Center. 2-3 Kuboyama-cho, Hachioji-shi, |