[1] Nippon Med Sch, Dept Emergency & Crit Care Med, Tokyo 113, Japan
[2] Takeda Gen Hosp, Dept Emergency Med, Fukushima, Japan
[3] Fukushima Prefectural Aizu Gen Hosp, Dept Surg, Fukushima, Japan
[4] Fukushima Prefectural Minami Aizu Hosp, Dept Surg, Fukushima, Japan
[5] Bange Kousei Gen Hosp, Dept Internal Med, Fukushima, Japan
[6] Yuurin Hosp, Dept Surg, Fukushima, Japan
[7] Tatami Asahi Hosp, Fukushima, Japan
[8] Fukushima Prefectural Kitakata Hosp, Dept Internal Med, Fukushima, Japan
[9] Fukushima Prefectural Miyashita Hosp, Dept Surg, Fukushima, Japan
[10] Nishiaizu Hosp, Fukushima, Japan
[11] Aizu Chuo Hosp, Dept Emergency & Crit Care Med, Fukushima, Japan
[12] Tohoku Univ, Grad Sch Med, Div Emergency Med, Sendai, Miyagi 980, Japan
[13] Matsuyama Rehabil Hosp, Dept Internal Med, Matsuyama, Ehime, Japan