1. Division of Microbiology and Infectious DiseasesNiigata University Graduate School of Medical and Dental Sciences Niigata Japan
2. Department of Microbiology and Infection Control SciencesKyoto Pharmaceutical University Kyoto Japan
3. Department of Pediatric DentistryNiigata University Graduate School of Medical and Dental Sciences Niigata Japan
4. Department of Chemistry and Functional Molecule, Faculty of Pharmaceutical SciencesTokushima Bunri University Tokushima Japan
5. Division of Cariology, Operative Dentistry and EndodonticsNiigata University Graduate School of Medical and Dental Sciences Niigata Japan
6. Research Centre for Advanced Oral ScienceNiigata University Graduate School of Medical and Dental Sciences Niigata Japan