1. Department of Internal Medicine, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung, Korea.
2. Department of General Surgery, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung, Korea.
3. Department of Diagnostic Radiology, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung, Korea.
4. Department of Pathology, Hallym University Chuncheon Sacred Heart Hospital, Chuncheon, Korea.