The epidemiology of disabling headache.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D003430:Cross-Sectional Studies; D005060:Europe; D005260:Female; D006261:Headache / Q000453:epidemiology* / Q000209:etiology; D006801:Humans; D006973:Hypertension / Q000150:complications; D008297:Male; D008875:Middle Aged; D008881:Migraine Disorders / Q000453:epidemiology* / Q000209:etiology; D012306:Risk; D012737:Sex Factors; D012907:Smoking; D013315:Stress, Psychological; D014481:United States; D014887:Weather