Affiliation: | 1. Department of periodontics and oral medicine, College of Stomatology, Guangxi Medical University, Guangxi, China;2. Guangxi Center for Disease Control, Guangxi, China;3. Department of periodontics and oral medicine, College of Stomatology, Guangxi Medical University, Guangxi, China Guangxi Key Laboratory of AIDS Prevention and Treatment, Guangxi Medical University, Guangxi, China Correspondence to: Renchuan Tao, Department of periodontics and oral medicine, College of Stomatology, Guangxi Medical University, Nanning, Guangxi 86530021, China. E-mail: taorenchuan@gmail.com |