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, School of Medicine, Kyungpook National University, Daegu, Korea
3. Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
4. Gachon University Gil Medical Center, Incheon, Korea
5. Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea