title: [Effect of a vitamin B2 derivative on recurrent oral ulcers; sequential analysis].
mesh_terms: D000293:Adolescent; D000328:Adult; D002986:Clinical Trials as Topic; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012008:Recurrence; D012256:Riboflavin / Q000031:analogs & derivatives / Q000627:therapeutic use*; D013281:Stomatitis, Aphthous / Q000188:drug therapy*
chemical_list: D012256:Riboflavin