1 Department of Cardiothoracic Surgery, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Republic of Korea.
2 Department of Cardiovascular Surgery, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea.
3 Department of Thoracic and Cardiovascular Surgery, Severance Cardiovascular Hospital, Yonsei University College of Medicine, Yonsei University Health System, Seoul, Republic of Korea.