1. Faculty of Home Economics, Aichi Gakusen University, Okazaki, Aichi, Japan
2. Division of Surgery, Iwata City Hospital, Iwata, Shizuoka, Japan
3. Department of Gastroenterological Surgery, Hamamatsu Medical Center, Hamamatsu, Shizuoka, Japan
4. Department of Emergency Medicine, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan