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Wakako Jo
Department of Pediatrics, Sapporo City Hospital, Sapporo, Japan
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Hitomi Sano
Department of Pediatrics, Sapporo City Hospital, Sapporo, Japan
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Akira Sudo
Department of Pediatrics, Sapporo City Hospital, Sapporo, Japan
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Yukiko Matsunami
Department of Pediatrics, Sapporo City Hospital, Sapporo, Japan
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Nobuaki Kawamura
Department of Pediatrics, Sapporo City Hospital, Sapporo, Japan
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Toshihiro Tajima
Department of Pediatrics, Hokkaido University School of Medicine, Sapporo, Japan