1. The Historical Records Preservation Committee, The Korean Society for Thoracic and Cardiovascular Surgery, Seoul, Korea
2. Department of Thoracic and Cardiovascular Surgery, Kyungpook National University Hospital, Kyungpook National University School of Medicine, Daegu, Korea
3. Gachon University Gil Medical Center, Incheon, Korea
4. Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
5. Department of Cardiothoracic Surgery, National Medical Center, Seoul, Korea