1. Assistant Professor, Department of Dental Anesthesiology, Tokyo Dental College, Tokyo, Japan
2. Professor and Chairman, Division of Special Needs Dentistry & Orofacial Pain, Department of Oral Health & Clinical Science, Tokyo Dental College, Tokyo, Japan
3. Professor, Department of Dental Anesthesiology, Tokyo Dental College, Tokyo, Japan
4. Professor and Chairman, Department of Dental Anesthesiology, Tokyo Dental College, Tokyo, Japan