Funding for this research was provided by:
National Natural Science Foundation of China (81600822)
Innovative Research Group Project of the National Natural Science Foundation of China (81873707)
Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD, 2018-87)
Science and Technology Development Project of Jiangsu Province (BE2017731)
SuYan Research & Development Funds for Intelligent Health Science & Technology Innovation (NMU-SY201804)
Postgraduate Research & Practice Innovation Program of Jiangsu Province (KYCX19_1147)
Received: 7 November 2019
Accepted: 11 February 2020
First Online: 3 April 2020
Ethics approval and consent to participate
: The study was approved by the ethics committee of the Affiliated Stomatological Hospital of Nanjing Medical University (201702033), and patients’ written informed consent was obtained.
: Persons depicted in illustrations gave consent for publication.
: The authors declare no competing interests.