4 .Department of Stomatology, Huaihe Hospital of
Henan University, Kaifeng, Henan 475000, China
* Corresponding authors.
E-mail
addresses: 10190096@vip.henu.edu.cn (X.-Y. J.), ddwubiomed2010@163.com
(D.-D. W.), +86 371 22868833 (X.-Y. J.), +86 371 23880525 (D.-D. W.).