Li, Hongwei
Lian, Jianhong
Jin, Hongxing
Wang, Weili
Cao, Jianzhong
Zhang, Xiaqin
Song, Xin
Jia, Sufang
Jia, Haixia
Ren, Jiwei
Han, Songyan
Yang, Weihua
Xi, Yanfeng
Lan, Shengmin
Funding for this research was provided by:
Research Project Supported by Health and Familly Planning Commission of Shanxi Province Scolarship in China (2015052)