title: Letter: Herpes labialis and multiple sclerosis.
mesh_terms: D000328:Adult; D005260:Female; D006560:Herpes Labialis / Q000150:complications / Q000453:epidemiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009103:Multiple Sclerosis / Q000150:complications* / Q000175:diagnosis; D012008:Recurrence; D013281:Stomatitis, Aphthous / Q000150:complications / Q000453:epidemiology