title: Biological homogeneity, symptom heterogeneity, and the diagnosis of schizophrenia.
abstract: Much biological research is directed at using biological variables to predict traditional symptom-based psychiatric categories. In this article, the authors discuss the need for a research strategy in which biological variables actually define psychiatric groups.
mesh_terms: D006801:Humans; D012106:Research; D012559:Schizophrenia / Q000145:classification / Q000175:diagnosis* / Q000209:etiology