1. Department of Gastroenterology, Internal Medicine; Kitasato University School of Medicine; Sagamihara Japan
2. Department of Healthcare Administration; Kitasato University School of Medicine; Sagamihara Japan
3. Department of Endoscopic Center; Shin-yurigaoka General Hospital; Kawasaki Japan
4. Department of Diagnostic Radiology; Kitasato University School of Medicine; Sagamihara Japan