1 Division of Cardiovascular Surgery, Department of Surgery, Mackay Memorial Hospital, Taipei, Taiwan.
2 Division of Cardiovascular Surgery, Department of Surgery, Mackay Memorial Hospital, Taipei, Taiwan; MacKay Medical College, New Taipei, Taiwan.
3 Division of Cardiovascular Surgery, Department of Surgery, Mackay Memorial Hospital, Taipei, Taiwan; MacKay Medical College, New Taipei, Taiwan. Electronic address: cvs.4253@mmh.org.tw.