1. Department of Hepatobiliary and Pancreatic Surgery, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
2. Department of Pathology, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
3. Department of Quality Assurance, Samyang Biopharmaceuticals Corporation, Daejeon, Korea.
4. Department of Research and Development, Medical Device Program, Samyang Biopharmaceuticals Corporation, Daejeon, Korea.