Xu, Mengru
Yuan, Chao
Sun, Xiangyu
Cheng, Menglin
Xie, Yanyi
Funding for this research was provided by:
the Program for New Clinical Techniques and Therapies of Peking University School and Hospital of Stomatology
Article History
Received: 1 October 2017
Accepted: 1 March 2018
First Online: 6 March 2018
Ethics approval and consent to participate
: This study protocol was approved by the Human Research Ethics Board of Peking University Health Science Center, Beijing (No. IRB0000105210090). All parents of enrolled children provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.
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