Xiao, Ling http://orcid.org/0000-0003-3025-467X
Yuan, Jianghong
Yao, Qiuming
Yan, Ni
Song, Ronghua
Jiang, Wenjuan
Li, Danfeng
Shi, Liangfeng
Zhang, Jin-an
Funding for this research was provided by:
Shanghai Jinshan District Health and Family Planning Commission (JSKJ-KTMS-2013-02)