Kindai University - Department of Gastroenterology and Hepatology, Kindai University - Department of Radiology, Massachusetts General Hospital - Director, Global Outreach for Radiation Protection Program, Kindai University Hospital - Clinical Research Center, Kindai University - Department of Gastroenterology and Hepatology, Kindai University - Department of Gastroenterology and Hepatology, Kindai University - Department of Gastroenterology and Hepatology, Kindai University - Department of Gastroenterology and Hepatology, Kindai University - Department of Gastroenterology and Hepatology, Kindai University - Department of Gastroenterology and Hepatology, Kindai University - Department of Gastroenterology and Hepatology, Kindai University - Department of Gastroenterology and Hepatology, Kindai University - Department of Gastroenterology and Hepatology, Kindai University - Department of Gastroenterology and Hepatology, Kindai University - Department of Gastroenterology and Hepatology, Kindai University - Department of Gastroenterology and Hepatology, Kindai University - Department of Gastroenterology and Hepatology, Hayashi Clinic - Department of Gastroenterology and Internal Medicine, Toyonaka Municipal Hospital - Department of Gastroenterology and Kindai University - Department of Gastroenterology and Hepatology