1. Departments of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 138-736, Republic of Korea
2. Gastrointestinal Endoscopy and Liver Unit, Kasr Al-Ainy, Faculty of Medicine, Cairo University, Cairo, Egypt
3. Departments of Biomedical Engineering Research Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 138-736, Republic of Korea
4. Department of Minimal-Invasive Intervention, he Affiliated Cancer Hospital of Zhengzhou University, 127 Dongming Road, Zhengzhou 450003, Henan Province, China.
5. Department of Radiology and Research Institute of Clinical Medicine, Chonbuk National University-Biomedical Research Institute of Chonbuk National University Hospital, 20 Geonji-ro, Deokjin-gu, Jeonju, Chonbuk5a4907, Republic of Korea
6. Department of Radiology, Tianjin Medical University General Hospital, Anshan Road 154#, Heping District, CN 300052, China
7. Departments of Rehabilitation, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 138-736, Republic of Korea