Risk factors and perinatal outcomes for preterm birth in 21 health facilities in China
WANG Xi, KANG Chuyun, GAO Yanqiu, PANG Ruyan, WANG Yan
Chinese Journal of Reproductive Health ›› 2014, Vol. 25 ›› Issue (1) : 1-5.
Risk factors and perinatal outcomes for preterm birth in 21 health facilities in China
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