Catatonia and psychotic (delusional) depression, distinct syndromes in DSM-IV.
Fink
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D002389:Catatonia / Q000145:classification / Q000175:diagnosis*; D003702:Delusions / Q000145:classification / Q000175:diagnosis*; D003866:Depressive Disorder / Q000145:classification / Q000175:diagnosis*; D006801:Humans; D009626:Terminology as Topic