1. Department of Gastroenterology; Drum Tower Hospital; Nanjing University School of Medicine; Nanjing China
2. Department of Ultrasound Diagnosis; Drum Tower Hospital; Nanjing University School of Medicine; Nanjing China
3. Department of Radiology; Drum Tower Hospital; Nanjing University School of Medicine; Nanjing China
4. Department of Pathology; Drum Tower Hospital; Nanjing University School of Medicine; Nanjing China