1. Mouse Functional Genomics Research Group, RIKEN GSC, 3-1-1 Kouyadai, Tsukuba, Ibaraki 305-0074, Japan
2. Advanced Genome Information Technology Research Group, RIKEN GSC, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama City, Kanagawa 230-0045, Japan
3. Integrative Omics Research Team, RIKEN GSC, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama City, Kanagawa 230-0045, Japan