The Predictive Value of Four Microelements Levels in Different Trimesters for Fetal Growth Restriction 
LIU Zhaomin,PU Yuanlin,WU Huijie,LI Li
Chinese General Practice . 2020, (32): 4059 -4063 .  DOI: 10.12114/j.issn.1007-9572.2020.00.446