1. Department of Pediatric Dentistry Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences Okayama Japan
2. Department of Pediatric Dentistry Osaka University Graduate School of Dentistry Osaka Japan
3. Department of Veterinary Public Health II, School of Veterinary Medicine Azabu University Sagamihara Japan
4. Department of Pharmacology School of Veterinary Medicine, Azabu University Sagamihara Japan