1. Fukuoka Dental Office, Kagoshima, Japan.
2. Department of Geriatric Dentistry, Osaka Dental University, Osaka, Japan.
3. Department of Anesthesiology, Osaka Dental University, Osaka, Japan.
4. Bees Dental Office, Fukuoka, Japan.
5. Department of Oral and Maxillofacial Surgery, Field of Oral and Maxillofacial Surgery, Developmental Therapeutics Course, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan.