1. Department of Radiology, Good-Jang Hospital, Seoul, Korea.
2. Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.
3. Department of Brain and Cognitive Engineering, Korea University, Seoul, Korea.
4. Department of Artificial Intelligence, Korea University, Seoul, Korea.
5. Department of Radiology, Hanyang University Medical Center, Hanyang University School of Medicine, Seoul, Korea.
6. Department of Gastroenterology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.