1. Department of Oral and Maxillofacial Surgery; Stomatological Hospital of Southern Medical University & Guangdong Provincial Stomatological Hospital; Southern Medical University; Guangzhou 510260 Guangdong China
2. Department of Stomatology; Guizhou Provincial People's Hospital; Guiyang 550002 Guizhou China
3. Department of Pathology; Fudan University Shanghai Cancer Center; Shanghai 200032 China
4. Department of Oncology; Shanghai Medical College; Fudan University; Shanghai 200032 China