CATs are written summaries of the application of the practice of evidence-based medicine to specific clinical problems. The problem is translated into an answerable, 4-part, well-structured question; the best evidence to answer the question is identified; the evidence is critically appraised for its validity, magnitude, and precision; and the evidence is applied back to the patients. Essentially, CATs are mini–systematic reviews of narrow, patient-focused questions that are not easy to find in a textbook. For example, after a clinical encounter, a patient-oriented question might be formulated, which would then be followed by a search for relevant high-quality information to answer that question. The identified studies will be briefly and critically appraised, then applied back to the patient along with the commentary.