An evaluation on the efficacy and safety of amlexanox oral adhesive tablets in the treatment of recurrent minor aphthous ulceration in a Chinese cohort: a randomized, double-blind, vehicle-controlled, unparallel multicenter clinical trial - Liu, Jie; Zeng, Xin; Chen, Qianming (Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 2006)