1. Department of Periodontology and Endodontology, Division of Oral Health Science, Hokkaido University
Graduate School of Dental Medicine
2. Department of Preventive Dentistry, Division of Oral Health Science,
Hokkaido University Graduate School of Dental Medicine
3. Department of Dentistry and Oral Surgery, Aomori Prefectural Central Hospital
4. Nagayama Family Dental Clinic
5. Department of Dermatology, Aomori Prefectural Central Hospital