Tension headaches: psychophysiological investigation and treatment.
D000293:Adolescent; D000328:Adult; D000680:Amyl Nitrite / Q000627:therapeutic use; D001676:Biofeedback, Psychology; D004576:Electromyography; D005260:Female; D005500:Follow-Up Studies; D006261:Headache / Q000523:psychology* / Q000628:therapy; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D011602:Psychophysiologic Disorders / Q000523:psychology*; D012064:Relaxation Therapy; D012684:Sensory Thresholds; D013315:Stress, Psychological / Q000523:psychology
D000680:Amyl Nitrite