1. Division of Pediatric Cardiology; Saitama Medical Center, Saitama Medical University; Kawagoe Saitama Japan
2. Department of Pediatrics; Gunma University School of Medicine; Maebashi Gunma Japan
3. Department of Pediatric Cardiology; Tokyo Women's Medical University; Shinjuku Tokyo Japan
4. Johns Hopkins Medical Institute; Baltimore Maryland USA
5. Department of Pediatrics; University of Tokyo Hospital; Bunkyo Tokyo Japan
6. Department of Pediatrics; Asahikawa Medical University; Asahikawa Hokkaido Japan
7. Mayo Clinic; Rochester Minnesota USA