Depression in aging persons with schizophrenia.
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D000367:Age Factors; D000368:Aged; D015897:Comorbidity; D003866:Depressive Disorder / Q000175:diagnosis / Q000453:epidemiology*; D006801:Humans; D008875:Middle Aged; D010506:Periodicals as Topic / Q000592:standards; D011643:Publishing / Q000592:standards; D012559:Schizophrenia / Q000175:diagnosis / Q000453:epidemiology*; D012565:Schizophrenic Psychology