title: Behçet's syndrome and aphthosis.
mesh_terms: D001528:Behcet Syndrome / Q000175:diagnosis* / Q000276:immunology; D003186:Complement C9 / Q000032:analysis; D003937:Diagnosis, Differential; D006801:Humans; D013281:Stomatitis, Aphthous / Q000175:diagnosis* / Q000276:immunology
chemical_list: D003186:Complement C9