Depressive illness in childhood presenting as severe headache.
D000293:Adolescent; D002648:Child; D002653:Child Behavior Disorders / Q000175:diagnosis*; D002675:Child, Preschool; D003863:Depression / Q000175:diagnosis* / Q000235:genetics; D005260:Female; D005500:Follow-Up Studies; D006261:Headache / Q000175:diagnosis*; D006801:Humans; D008297:Male; D012189:Retrospective Studies