Du, Jing
Lu, Yating
Song, Mengxiao
Yang, Lin
Liu, Junqing
Chen, Xinyu
Ma, Yue
Wang, Yan
Funding for this research was provided by:
the Science and Technique Development Foundation of Shandong province (2014GSF118124)
Article History
Received: 6 September 2018
Accepted: 20 January 2020
First Online: 12 February 2020
Ethics approval and consent to participate
: This study was approved by Medical Ethics Committee of school and hospital of stomatology, Shandong University, Shandong, China. All procedures were explained to patients, the written informed consent was signed by the patients or their parents.
: Not applicable.
: The authors declare that they have no competing interests.