1. Integrated Bioresource Information Division BioResource Research Center RIKEN 3‐1‐1 Koyadai Tsukuba Ibaraki 305‐0074 Japan
2. Laboratory of Mathematical Biology Faculty of Advanced Life Science Hokkaido University Kita‐10 Nishi‐8Kita‐ku Sapporo Hokkaido 060‐0819 Japan
3. PRESTO Japan Science and Technology Agency 4‐1‐8 Honcho Kawaguchi Saitama 332‐0012 Japan
4. Institute for Advanced Biosciences Keio University 246‐2 MizukamiKakuganji Tsuruoka Yamagata 997‐0052 Japan
5. Intestinal Microbiota Project Kanagawa Institute of Industrial Science and Technology 3‐25‐13 TonomachiKawasaki‐ku Kawasaki Kanagawa 210‐0821 Japan
6. Transborder Medical Research Center University of Tsukuba 1‐1‐1 Tennodai Tsukuba Ibaraki 305‐8575 Japan