Dong, Ying
Wang, Zengwu
Chen, Zuo
Wang, Xin
Zhang, Linfeng
Nie, Jingyu
Zheng, Congyi
Wang, Jiali
Shao, Lan
Tian, Ye
Gao, Runlin
Funding for this research was provided by:
Ministry of Science and Technology of the People's Republic of China (2011BAI11B01)
National Health and Family Planning Commission of the People's Republic of China (201402002)
Article History
Received: 2 August 2017
Accepted: 7 February 2018
First Online: 17 February 2018
Ethics approval and consent to participate
: The ethical review committee of Fuwai Hospital (Beijing, China) and each participating center (Additional fileInternalRef removed) approved the study’s protocol. And all the participants gave written informed consent prior to data collection.
: Not applicable
: The authors declare that they have no competing interests from BUCHANG PHARMA, Xian, China, Pfizer China, and Essen Technology Company Limited. All the funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
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