Ren-Ying, Yan... [et al.]. <br/><br/>
The risk approach in perinatal health : Shunyi Country, People's Republic of China. 

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<br/><br/><label>Subjects--Topical Terms: </label><br/>Maternal health services--China<br/>Risk factors<br/>Maternal mortality--China<br/>Perinatology<br/>Infant mortality--China<br/>Child health services--China