title: An unusual etiology of urticaria.
mesh_terms: D000293:Adolescent; D005260:Female; D006801:Humans; D008768:Methylmethacrylates / Q000276:immunology; D009967:Orthodontic Appliances / Q000009:adverse effects; D012882:Skin Tests; D014581:Urticaria / Q000209:etiology* / Q000276:immunology
chemical_list: D008768:Methylmethacrylates