1. Division of Periodontology, Department of Oral Interdisciplinary Medicine, Graduate School of Dentistry, Kanagawa Dental University, Japan
2. Department of Advanced Clinical Science and Therapeutics, The University of Tokyo, Japan
3. Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Japan
4. Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Japan
5. Department of Periodontology, Kyushu Dental University, Japan
6. Department of Oral Microbiology, Tsurumi University, Japan
7. Department of Cardiovascular Medicine, The University of Tokyo, Japan