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Authors
Zhang, Shaoyun
Huang, Qiang
Xie, Jinwei
Xu, Bin
Cao, Guorui
Pei, Fuxing
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Funding
Funding for this research was provided by:
National Health and Family Planning Commission of the People's Republic of China (201302007)
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More Information
Article History
Received: 8 June 2017
Accepted: 23 January 2018
First Online: 2 February 2018
Ethics approval and consent to participate
: The study protocol was approved by the Institutional Review Board (IRB) of West China Medical Center of Sichuan University (2012–268). For this type of study, formal consent is not required.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
