Chen, Jie
Lu, Wen-yi
Zhao, Ming-feng
Cao, Xiao-li
Jiang, Yan-yu
Jin, Xin
Xu, Ping
Yuan, Ting-ting
Zhang, Yu-chen
Chai, Xiao
Meng, Juan-xia
Li, Qing
Xiao, Xia
Mu, Juan
Li, De-guan
Qi, Ai-ping
Funding for this research was provided by:
National Natural Science Foundation of China (81400092, 81400083)
the National Natural Science Foundation of Tianjin (13JCYBJC23400)
the Science and Technique Foundation of Tianjin (13KG106)
Tianjin municipal health and Family Planning Commission (2015KR15)