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HIROOMI KEINO
Department of Perinatology, Institute for Developmental Research, Kamiyacho, Kasugai, Aichi 480-03, Japan
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TOSHIKAZU BANNO
Department of Clinical Inspection, Hospital of Aichi Cancer Center, Chikusaku, Nagoya, Aichi 464, Japan
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JUNKO OZEKI
Department of Perinatology, Institute for Developmental Research, Kamiyacho, Kasugai, Aichi 480-03, Japan