1. Emergency and Critical Care Center, Kagoshima City Hospital, Kagoshima 890-8760, Japan
2. Department of Emergency Medicine, Kyoto Prefectural University of Medicine, Kyoto 602-0841, Japan
3. Department of Orthopedics, Sendai Medical Association Hospital, Kagoshima 895-0005, Japan
4. Department of Surgery, Saiseikai Fukuoka General Hospital, Fukuoka 810-0001, Japan