1. Department of Oral Biology, Rutgers School of Dental Medicine, Newark, New Jersey, USA
2. Department of Endodontics, Osaka Dental University, Hirakata, Osaka, Japan
3. Department of Periodontal Medicine, Graduate School of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
4. Miyamoto Dental & Orthodontic Office, Kobe, Hyogo, Japan
5. Tanpopo Dental Clinic, Soja, Okayama, Japan
6. National Sanatorium Oshima Seisho-en, Takamatsu, Kagawa, Japan
7. Regional Liaison Center, Fukuoka Dental College, Fukuoka, Japan
8. Section of Periodontology, Division of Oral Rehabilitation, Kyushu University Faculty of Dental Science, Fukuoka, Japan
9. Department of Pathophysiology-Periodontal Science, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
10. Department of Oral Microbiology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan