1. Department of Thoracic and Cardiovascular Surgery, Wonkwang University School of Medicine, Iksan, Korea
2. Department of Thoracic and Cardiovascular Surgery, Seoul National University Bundang Hospital, Seongnam, Korea
3. Division of Biomedical Informatics, Seoul National University Biomedical Informatics, Seoul National University College of Medicine, Seoul, Korea
4. Department of Thoracic and Cardiovascular Surgery, Seoul National University College of Medicine, Seoul, Korea