1. Research Unit for Oral-Systemic Connection, Division of Oral Science for Health Promotion, Niigata University Graduate School of Medical and Dental Sciences, Chuo-ku, Niigata, Japan
2. Division of Periodontology, Niigata University Graduate School of Medical and Dental Sciences, Chuo-ku, Niigata, Japan
3. Laboratory for Intestinal Ecosystem, RIKEN Centre for Integrative Medical Sciences (IMS), Yokohama, Kanagawa, Japan
4. Intestinal Microbiota Project, Kanagawa Institute of Industrial Science and Technology, Kawasaki, Japan
5. Division of Bioinformatics, Niigata University Graduate School of Medical and Dental Sciences, Chuo-ku, Niigata, Japan