1. Department of Oral Medicine, Institute of Health Biosciences, the University of Tokushima Graduate Faculty of Dentistry, Kuramoto 3-18-15, Tokushima 770-8504, Japan
2. Department of Dental Anesthesiology, Institute of Health Biosciences, the University of Tokushima Graduate Faculty of Dentistry, Kuramoto 3-18-15, Tokushima 770-8504, Japan