1. Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
2. Department of Cardiovascular Surgery, St. Marianna University School of Medicine, Miyamae-ku, Kawasaki, Kanagawa, Japan
3. Department of Pediatrics, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
4. Department of Pathology, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
5. Department of Cardiac Surgery, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan