The network perspective will help, but is comorbidity the question?. Johnson, W. & Penke, L. BEHAVIORAL AND BRAIN SCIENCES, 33(2-3):162+, APR-JUN, 2010.
doi  abstract   bibtex   
Latent variable modeling has revealed important conundrums in the DSM classification system. We agree that the network perspective has potential to inspire new insights and resolve some of these conundrums. We note, however, that alone it cannot really help us understand etiology. Etiology, not comorbidity, is the fundamental question.
@article{ ISI:000279973200043,
  author = {Johnson, Wendy and Penke, Lars},
  title = {{The network perspective will help, but is comorbidity the question?}},
  journal = {{BEHAVIORAL AND BRAIN SCIENCES}},
  year = {{2010}},
  volume = {{33}},
  number = {{2-3}},
  pages = {{162+}},
  month = {{APR-JUN}},
  abstract = {{Latent variable modeling has revealed important conundrums in the DSM
   classification system. We agree that the network perspective has
   potential to inspire new insights and resolve some of these conundrums.
   We note, however, that alone it cannot really help us understand
   etiology. Etiology, not comorbidity, is the fundamental question.}},
  doi = {{10.1017/S0140525X10000634}},
  issn = {{0140-525X}},
  unique-id = {{ISI:000279973200043}}
}
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