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Masuyoshi Naganuma
Dept. of Pediatric cardiology. National Children's Hospital, Tokyo
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Norio Matsuo
Dept. of Pediatric cardiology. National Children's Hospital, Tokyo
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Katsuhiro Yoshitake
Dept. of Pediatric cardiology. National Children's Hospital, Tokyo
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Isamu Yamamoto
Dept. of Pediatric cardiology. National Children's Hospital, Tokyo