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Authors
Li, Yulong
Zhang, Rui
Han, Yanxi
Lu, Tian
Ding, Jiansheng
Zhang, Kuo
Lin, Guigao
Xie, Jiehong
Li, Jinming
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Funding
Funding for this research was provided by:
the Special Fund for Health Scientific Research in the Public Interest from National Population and Family Planning Commission of the PR China (201402018)
