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Authors
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Funding
Funding for this research was provided by:
The capital health research and development of special (2016-1-4103)
Beijing Municipal Science &Technology Commission (Z181100001718130)
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Article History
Received: 8 January 2020
Accepted: 10 July 2020
First Online: 22 August 2020
Compliance with ethical standards
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: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This study was approved by the institutional review board of the Peking University School and Hospital of Stomatology (Beijing, China; PKUSSIRB-201944043).This article does not contain any studies with animals performed by any of the authors.
: Informed consent was obtained from all individual participants included in the study.
