The role of personality in the etiology of chronic headache.
D000328:Adult; D000368:Aged; D002908:Chronic Disease; D005260:Female; D006261:Headache / Q000523:psychology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010551:Personality; D011581:Psychological Tests; D013223:Statistics as Topic; D013997:Time Factors