Prenatal exposure to multiple air pollutants and risks of preterm birth and low birth weight in twins: A comparison between natural conception and medically assisted reproduction

• Wenpu ShaoFudan University
• Zhiping NiuFudan University
• Hao ZhouJiangnan University
• Haifeng XuJiangnan University
• Yangyang ZhuFudan University
• Shuang DuFudan University
• Yanyi XuFudan University
• Xinlin HouPeking University First Hospital
• Fang XiongJiangnan University
• Renci ZhuJiangnan University
• Weishe ZhangXiangya Hospital Central South University
• Zhice XuJiangnan University
• Ying GuJiangnan University
• Minya SunJiangnan University
• Ying ChenJiangnan University
• Zhuohui ZhaoFudan University