1. Department of Periodontology, Faculty of Dentistry, Kanagawa Dental University, Yokosuka 238-8580, Japan
2. Department of Dental Hygiene, Kanagawa Dental University, Junior College, Yokosuka 238-8580, Japan
3. Department of Gastroenterology and Hepatology, Yokohama City University Graduate School of Medicine, Yokohama 236-0004, Japan
4. Department of Palliative Medicine and Gastroenterology, International University of Health and Welfare, Narita Hospital, Narita 286-8520, Japan
5. Department of Microbiology and Immunology, Nihon University School of Dentistry, Tokyo 101-8310, Japan
6. Department of Implantology and Periodontology, Faculty of Dentistry, Kanagawa Dental University, Yokohama 221-0835, Japan
7. International Photocatalyst Research Institute, University of Shanghai for Science and Technology, Shanghai 200093, China
8. Department of Clinical Oral Anatomy, Faculty of Dentistry, Kanagawa Dental University, Yokosuka 238-8580, Japan
9. Faculty of Dentistry, Kanagawa Dental University, Yokosuka 238-8580, Japan
10. Department of Oral and Maxillofacial Surgery, Yokohama City University Graduate School of Medicine, Yokohama 236-0004, Japan