1. Lecturer, Section of Anaesthesiology, Department of Diagnostics & General Care, Fukuoka Dental College, Fukuoka, Japan,
2. Professor, Section of Anaesthesiology, Department of Diagnostics & General Care, Fukuoka Dental College, Fukuoka, Japan, and
3. Graduate Student, Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Shimane University, Matsue, Japan