Oral ulceration--clinical aspects.
D003095:Collagen Diseases; D003384:Coxsackievirus Infections; D004342:Drug Hypersensitivity; D004892:Erythema Multiforme; D006801:Humans; D008010:Lichen Planus; D009059:Mouth Diseases; D009912:Oral Manifestations; D010392:Pemphigus; D012907:Smoking; D013281:Stomatitis, Aphthous