1. Department of Oral and Maxillofacial‐Head and Neck Oncology Beijing Stomatological Hospital, Capital Medical University Beijing China
2. Department of Stomatology Beijing Friendship Hospital, Capital Medical University Beijing China
3. Department of Pathology Beijing Stomatological Hospital, Capital Medical University Beijing China
4. Department of Oral and Maxillofacial‐Head & Neck Oncology Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine Shanghai China
5. Clinical Epidemiology and EBM Unit, National Clinical Research Center for Digestive Diseases Beijing Friendship Hospital, Capital Medical University Beijing China
6. Department of Oral and Maxillofacial Surgery Peking University School and Hospital of Stomatology Beijing China