1. Department of Radiology, Mayo Clinic, Rochester, Minnesota, USA
2. Department of Radiology, Zhongshan Hospital, Fudan University, Shanghai, China
3. Division of Anatomic Pathology, Mayo Clinic, Rochester, Minnesota, USA
4. Department of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, Minnesota, USA
5. Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA