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189- How Drugs are Evaluated: Patients’ Guide to Randomized Clinical Trials

Until the mid-twentieth century, healers relied upon their collective and individual experience to select the best remedy for a patient’s complaint. Even today, most treatments are trial and error. Physicians, almost unique among healers, have sought scientific bases for their treatments, and their most powerful tool is the randomized clinical trial (RCT). Reviewed 2009.

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