1. Department of Radiology and Research Institute of Radiological Science, Gangnam Severance Hospital, Yonsei University Health System, Seoul 06273, Korea.
2. Department of Cardiothoracic Surgery, Ajou University Hospital, Suwon 16499, Korea.
3. Department of Cardiothoracic Surgery, Gangnam Severance Hospital, Yonsei University Health System, Seoul 06273, Korea.