State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Head and Neck Oncology Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, China

The authors certify that they have obtained all appropriate patient consent forms. In the form, the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.

This study was approved by the Ethics Committee of West China Hospital of Stomatology, Sichuan University, China. Written informed consent was obtained from enrolled patients.

Supported by the National Natural Science Foundation of China (81872196).

Chuan-xi Deng and Zhang-fan Ding contributed equally to this work.

The authors report no conflict of interest.

Address correspondence and reprint requests to Ming Xuan, MD, Department of Head and Neck Oncology Surgery, West China Hospital of Stomatology, Sichuan University, No. 17 Section 3 South Renmin Road, Chengdu 610041, China; e-mail address: [email protected]