1 Department of Anesthesiology, Nagoya University Graduate School of Medicine, Nagoya, Japan. Division of Anesthesia, Aichi Children's Health and Medical Center, Obu, Japan. Division of Anesthesia, Japanese Red Cross Nagoya Daiichi Hospital, Nagoya, Japan. Division of Radiation Diagnosis, Japanese Red Cross Nagoya Daiichi Hospital, Nagoya, Japan. Department of Anesthesiology, Nagoya University Graduate School of Medicine, Nagoya, Japan.