1. Department of Surgery, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung, Korea.
2. Department of Pediatrics, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung, Korea.
3. Department of Pathology, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung, Korea.