Affiliation: | 1. Department of Oral and Maxillofacial Surgery, Sun Yat-sen University, Guangzhou 510120, China;2. Guangdong Institute of Gastroenterology, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou 510655, China;3. Department of Stomatology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China |