1. Department of Anesthesiology, Aichi Gakuin University School of Dentistry 2-11 Suemori-dori, Chikusa-ku, Nagoya, Aichi, Japan
2. Department of Anesthesiology and Intensive Care Medicine, Nagoya City University Graduate School of Medical Sciences 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, Japan
3. Division of Dento-oral Anesthesiology, Tohoku University Graduate School of Dentistry 4-1 Seiryomachi, Aoba, Sendai, Miyagi, Japan
4. Department of Anesthesiology, Toyokawa City Hospital, 23 Yahatacho Noji, Toyokawa-city, Aichi, Japan.