[1] Nagoya Univ, Grad Sch Med, Dept Emergency Med & Crit Care Med, Showa Ku, Nagoya, Aichi 4668550, Japan
[2] Teikyo Univ, Sch Med, Dept Surg, Tokyo 173, Japan
[3] Mie Univ, Sch Med, Tsu, Mie, Japan
[4] Nagoya Univ, Grad Sch Med, Div Surg Oncol, Dept Surg, Nagoya, Aichi, Japan
[5] Kyoto Univ, Grad Sch Med, Sch Publ Hlth, Dept Healthcare Econ & Qual Management, Kyoto, Japan
[6] Kumamoto Univ, Grad Sch Med Sci, Dept Surg Gastroenterol, Kumamoto, Japan
[7] Fukuoka Univ Hosp, Dept Surg, Fukuoka, Japan
[8] Chiba Univ, Dept Med & Clin Oncol, Grad Sch Med, Chiba, Japan
[9] Teikyo Univ, Sch Med, Dept Med, Tokyo 173, Japan
[10] Jichi Med Univ Hosp, Div Infect Control & Prevent, Minami Kawachi, Tochigi, Japan
[11] Indiana Univ, Sch Med, Dept Surg, Indianapolis, IN 46202 USA