1. Department of Clinical Oncology, Toho University Graduate School of Medicine, Ota‑ku, Tokyo 143‑8541, Japan
2. Department of Gastroenterological Surgery, Toho University School of Medicine, Ota‑ku, Tokyo 143‑8541, Japan
3. Port Square Kashiwado Clinic, Kashiwado Memorial Foundation, Chuo-ku, Chiba 260‑0025, Japan
4. Department of Neurology, Kashiwado Hospital, Chuo-ku, Chiba 260‑0854, Japan
5. Department of Surgical Pathology, Toho University School of Medicine, Ota‑ku, Tokyo 143‑8541, Japan