title: Tension headaches.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D004522:Educational Status; D005260:Female; D006801:Humans; D008297:Male; D008396:Maryland / Q000453:epidemiology; D008875:Middle Aged; D018781:Tension-Type Headache / Q000453:epidemiology*