1. Gastroenterological Center Yokohama City University Medical Center Yokohama Japan
2. Department of Gastroenterology Yokohama City University Graduate School of Medicine Yokohama Japan
3. Department of Medical Ultrasound Ningbo Medical Center Lihuili Hospital Ningbo China
4. Department of Gastroenterology Shin‐Yurigaoka General Hospital Kawasaki Japan
5. Minimally Invasive Surgical and Medical Oncology Fukushima Medical University Fukushima Japan
6. Department of Gastroenterology, Internal Medicine Kitasato University School of Medicine Sagamihara Japan
7. Department of Gastroenterology and Hepatology Yokohama City University Graduate School of Medicine Yokohama Japan
8. Hepatobiliary and Pancreatic Medical Oncology Kanagawa Cancer Center Hospital Yokohama Japan
9. Division of Gastroenterology and Hepatology Department of Internal Medicine Tokai University School of Medicine Isehara Japan
10. Division of Gastroenterology and Hepatology Department of Internal Medicine St. Marianna University School of Medicine Kawasaki Japan
11. Department of Gastroenterology Fujisawa City Hospital Fujisawa Japan