1. Genetic Strains Research Center, National Institute of Genetics, Mishima, Japan.
2. Division of Gene Therapy, Research Center for Genomic Medicine, Saitama Medical University, Hidaka, Japan.
3. Research Institute for Microbial Diseases, Osaka University, Suita, Japan.
4. Laboratory of Reproductive and Developmental Biology, Hokkaido University, Sapporo, Japan.
5. Department of Radiation Genetics, Kyoto University, Kyoto, Japan.
6. Department of Genetics, The Graduate University for Advanced Studies (Sokendai), Mishima, Japan.