1. Departments of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
2. Gastrointestinal Endoscopy and Liver unit, Kasr Al-Ainy Faculty of Medicine, Cairo University, Cairo, Egypt
3. Department of Interventional Therapy, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
4. Department of Radiology and Research Institute of Clinical Medicine, Chonbuk National University-Biomedical Research Institute of Chonbuk National University Hospital, Jeonju, South Korea
5. Department of Radiologic Technology, Cheju Halla University, Jeju, Republic of Korea