Zhang, Zilong
Ma, Jun
Wang, Zhenghe
Dong, Yanhui
Yang, Zhaogeng
Dong, Bin
Ma, Yinghua
Funding for this research was provided by:
Research Special Fund for Public Welfare Industry of Health of the Ministry of Health of China (201202010)
Article History
Received: 19 October 2018
Accepted: 10 April 2019
First Online: 18 April 2019
Ethics approval and consent to participate
: Written informed consent was obtained from the participants and their parents/guardians prior to their participation. The study protocol was approved by the Ethical Committee of Peking University (Reference No.: IRB0000105213034).
: Not applicable.
: The authors declare that they have no conflicting interests related to this manuscript.
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