Analysis of short-term and sub-chronic effects of ambient air pollution on preterm birth in central China - Xiangyu Li; Yisi Liu; Feifei Liu; Yuxin Wang; Xuhao Yang; Junfeng Yu; Xiaowei Xue; Anqi Jiao; Yuanan Lu; Liqiao Tian; Shiquan Deng; Hao Xiang (Environmental Science and Pollution Research, 2018)