Zhou, Nan
Lv, Dong
Wang, Suting
Lin, Xiaojuan
Bi, Zhenwang
Wang, Haiyan
Wang, Pei
Zhang, Huaning
Tao, Zexin
Hou, Peibin
Song, Yanyan
Xu, Aiqiang
Funding for this research was provided by:
National Natural Science Foundation of China (81573209)
Taishan Scholar Program of Shandong Province (ts201511105)
Health and Family Planning Commission of Shandong Province (2013WS0158)