Headache centres.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000554:Ambulatory Care Facilities / Q000706:statistics & numerical data*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006261:Headache / Q000628:therapy; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008131:London; D008297:Male; D008875:Middle Aged; D008881:Migraine Disorders / Q000453:epidemiology / Q000628:therapy