School problems and other factors in childhood headache syndromes.
D000124:Achievement; D000293:Adolescent; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D005260:Female; D006261:Headache / Q000235:genetics / Q000523:psychology*; D006801:Humans; D008297:Male; D012574:Schools; D012737:Sex Factors