1. Department of Oral Medicine; Hospital of Stomatology; Guangzhou Guangdong China
2. Guangdong Provincial Key Laboratory of Stomatology; Guanghua School of Stomatology; Sun Yat-sen University; Guangzhou Guangdong China
3. Department of Oral Medicine; Affiliated Zhongshan Hospital; Sun Yat-sen University; Zhongshan Guangdong China