Yang, Ning-Yan
Zhou, Yan
Zhao, Huan-Ying
Liu, Xiao-Yong
Sun, Zheng
Shang, Jia-Jian http://orcid.org/0000-0001-7587-3920
Article History
Received: 9 October 2017
Accepted: 6 July 2018
First Online: 16 July 2018
Ethics approval and consent to participate
: The study design was approved by the Human Volunteers Research and Ethics Committee of the Capital Medical University School of Stomatology, Beijing, China ([2015]88). All procedures were explained in advance to the participating parents, and parental written informed consent was obtained for all patients.
: Not applicable
: The authors declare that they have no competing interests.
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