1. Department of Surgery, Fukuoka Sanno Hospital, Fukuoka, Fukuoka 814‑0001, Japan
2. Department of Surgery I, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Fukuoka 807‑8555, Japan
3. Department of Pathology, Fukuoka Sanno Hospital, Fukuoka, Fukuoka 814‑0001, Japan