Affiliation: | 1.Department of Anaesthesiology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8575, Ibaraki, Japan ;2.Department of Emergency and Critical Care Medicine, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8575, Ibaraki, Japan ;3.Department of Anaesthesia, Ibaraki Prefectural Central Hospital, 6528 Koibuchi, Kasama, 309-1793, Ibaraki, Japan ; |