Evidence for separate diseases?

@article{Hfner2008EvidenceFS,
  title={Evidence for separate diseases?},
  author={Heinz H{\"a}fner and Wolfram an der Heiden and Kurt Maurer},
  journal={European Archives of Psychiatry and Clinical Neuroscience},
  year={2008},
  volume={258},
  pages={85-96}
}
ObjectiveWe tested Kraepelin’s dichotomy model by studying the separability of schizophrenia and depression on the basis of symptoms and illness course.Materials and methodsMatched untreated patients with schizophrenia and depression (n = 130 each) and 130 “healthy” controls were assessed from onset to first admission. In a second study the same variables were studied in 107 patients with schizophrenia over a homogenised follow-up of 134 months (11.2 years).ResultsThe symptom most frequently… 
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