1. Department of Stomatology; Daping Hospital of the Third Military Medical University; Chongqing China
2. Department of Stomatology; The First Affiliated Hospital of Chongqing Medical University; Chongqing China
3. Department of Stomatology; Xinqiao Hospital of the Third Military Medical University; Chongqing China
4. Department of Stomatology; The Affiliated Hospital of Zunyi Medical University; Guizhou China