Zhang, Meng
Lan, Jing
Zhang, Tiantian
Sun, Wenshuang
Liu, Panpan
Wang, Zhifeng
Article History
Received: 12 January 2021
Accepted: 17 May 2021
First Online: 5 June 2021
Declarations
:
: Ethical approval was obtained from the Ethics Committee of the Chinese Stomatological Association (No. 2014-003). Written informed consent was obtained from adolescent’s legal guardians.
: Not applicable.
: The authors declare that they have no competing interests.