Hospital chart review provided more accurate comorbidity information than data from a general practitioner survey or an administrative database

  • David B. Preen, C. D'Arcy J. Holman, David M. Lawrence, Natalya J. Baynham, James B. Semmens
  • Journal of Clinical Epidemiology, December 2004, Elsevier
  • DOI: 10.1016/j.jclinepi.2004.03.016

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