title: Delusional and nondelusional unipolar depression: further evidence for distinct subtypes.
mesh_terms: D000328:Adult; D003702:Delusions / Q000523:psychology*; D003866:Depressive Disorder / Q000175:diagnosis / Q000523:psychology*; D006801:Humans; D008370:Manuals as Topic; D008875:Middle Aged; D012008:Recurrence