References
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- http://www.mclibrary.duke.edu/subject/ebm/ratios.html
- Jaeschke R, Guyatt GH, Sackett DL. Users’ guides to the medical literature: III. How to use an article about a diagnostic test: B. What are the results and will they help me in caring for my patients?. JAMA 1994; 271: 703–7