Association of maternal serum copper during early pregnancy with the risk of spontaneous preterm birth: A nested case-control study in China

by Yongxiu Hao, Yiming Pang, Huina Yan, Yali Zhang, Jufen Liu, Lei Jin, Lailai Yan, Da Chen, Ligang Hu, Qian Liu, Yanan Qin, Bin Wang, Zhiwen Li, Rongwei Ye, Le Zhang, Aiguo Ren
Published 2019-01-01