1. Department of Radiology, Kawasaki Medical School, Kurashiki, Okayama 701‑0192, Japan
2. Department of Urology, Kawasaki Medical School, Kurashiki, Okayama 701‑0192, Japan
3. Department of Gastroenterology and Hepatology, Kawasaki Medical School, Kurashiki, Okayama 701‑0192, Japan