1. Department of Radiology, Nanjing Drum Tower Hospital The Affiliated Hospital of Nanjing University Medical School Nanjing China
2. Department of Gastroenterology, Nanjing Drum Tower Hospital The Affiliated Hospital of Nanjing University Medical School Nanjing China
3. Philips Healthcare Shanghai China
4. Department of Ultrasound, Nanjing Drum Tower Hospital The Affiliated Hospital of Nanjing University Medical School Nanjing China