Affiliation: | (1) Department of Anesthesia, Kohoku General Hospital, Japan;(2) Department of Orthopedics, Kohoku General Hospital, Japan;(3) Department of Anesthesiology, Kyoto Prefectural University of Medicine, Kyoto, Japan;(4) Department of Anesthesia, Kohoku General Hospital, 1221 Kuroda, Kinomoto-cho, Ika-gun, Shiga-ken, 529-04, Japan |