title: [Preliminary report of a study on age at onset of schizophrenia].
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012559:Schizophrenia / Q000453:epidemiology*; D012737:Sex Factors; D014041:Tokyo