A Comparison of Risk Factors for Twin Preterm Birth in the United States Between 1981–82 and 1996–97 期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

A Comparison of Risk Factors for Twin Preterm Birth in the United States Between 1981–82 and 1996–97

作者姓名：	Kogan MD Alexander GR Kotelchuck M MacDorman MF Buekens P Papiernik E

摘要：
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