Chronic pain: an experimental analysis of the effects of exposure.
D000328:Adult; D001143:Arousal; D005260:Female; D006261:Headache / Q000523:psychology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D008881:Migraine Disorders / Q000523:psychology*; D012684:Sensory Thresholds; D012803:Sick Role