Yang, Xiaoxia
He, Lidan
Yan, Siqi
Chen, Xinyi
Que, Guoying
Article History
Received: 3 December 2020
Accepted: 19 June 2021
First Online: 25 June 2021
Declarations
:
: This study was performed according to Declaration of Helsinki and approved by the ethical committee of Stomatological Hospital, Southern Medical University (Approval Number: 2019-07). The parents or legal guardians of all participants provided written informed consent prior to the study.
: Not applicable.
: The authors declare that they have no competing interests.