1. Department of Thoracic Surgery, Kyoto University , Kyoto, Japan
2. Department of Thoracic Surgery, Kobe City Medical Center General Hospital , Kobe, Japan
3. Department of Pediatrics, Kyoto University , Kyoto, Japan
4. Department of Cardiovascular Medicine, Kyoto University , Kyoto, Japan
5. Department of Cardiovascular Surgery, Kyoto University , Kyoto, Japan