Letter: Relaxation therapy in migraine and chronic tension headache.
D000768:Anesthesia, General; D001521:Behavior Therapy; D005260:Female; D006261:Headache / Q000628:therapy*; D006801:Humans; D008297:Male; D008349:Manipulation, Orthopedic; D008881:Migraine Disorders / Q000628:therapy*; D012063:Relaxation