Zhang, Baoping
Li, Sihong
Gao, Shuting
Hou, Mingfang
Chen, Hong
He, Lulu
Li, Yiting
Guo, Yumeng
Wang, Errui
Cao, Rui
Cheng, Jingyang
Li, Ruiping
Zhang, Kailiang http://orcid.org/0000-0002-5661-3979
Article History
Received: 24 February 2020
Accepted: 15 July 2020
First Online: 18 August 2020
Ethics approval and consent to participate
: This study was approved by Ethics Committee of the School of Stomatology Lanzhou University (No. LZUKQ-2019-25), and all students provided written informed consent to participate in this study.
: Not applicable.
: The authors declare that they have no competing interests.