1. Department of Internal Medicine, University of Soonchunhyang College of Medicine, Korea.
2. Department of Radiology, University of Soonchunhyang College of Medicine, Korea.
3. Department of Diagnostic Pathology, University of Soonchunhyang College of Medicine, Korea.
4. Department of Internal Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.