Affiliation: | 1. Division of Pediatric Dentistry, School of Dentistry, Health Sciences University of Hokkaido, Ishikari-tobetu, Japan;2. Division of Dental Anesthesiology, School of Dentistry, Health Sciences University of Hokkaido, Ishikari-tobetu, Japan;3. Division of Pharmacology, School of Dentistry, Health Sciences University of Hokkaido, Ishikari-tobetu, Japan |