1. Division of Cardiovascular Surgery, Department of Surgery, Tri-Service General Hospital, National Defense Medical Center, Taipei 114202, Taiwan
2. Department of Anesthesia, Tri-Service General Hospital, National Defense Medical Center, Taipei 114202, Taiwan
3. School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110301, Taiwan
4. Institute of Physics, Academia Sinica, Taipei 115201, Taiwan