title: ABC of 1 to 7 (revised). Recurrent headache.
mesh_terms: D001927:Brain Diseases / Q000150:complications; D002648:Child; D002675:Child, Preschool; D006261:Headache / Q000209:etiology* / Q000628:therapy; D006801:Humans; D007223:Infant; D008881:Migraine Disorders / Q000209:etiology / Q000628:therapy; D012008:Recurrence; D013315:Stress, Psychological / Q000150:complications