Yan, Qun
Sun, Dongmei
Li, Xu
Chen, Guoliang
Zheng, Qinghu
Li, Lun
Gu, Chenhong
Feng, Bo
Funding for this research was provided by:
Key Dispilines Group Construction Project of Pudong Health Bureau of Shanghai (PWZxkq2010-04)
Key Specialty Construction Project of Pudong Health and Family Planning Commission of Shanghai (PWZz2013-04)
Project of Science and Technology of Pudong Health and Family Planning Commission of Shanghai (PW2013c-11)