The evidence on which to base practice: Different tools for different times.
Treasure
Tom
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D002986:Clinical Trials as Topic / Q000266:history; D004059:Diffusion of Innovation; D019317:Evidence-Based Medicine / Q000266:history*; D013502:General Surgery / Q000266:history*; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D011787:Quality of Health Care; D012107:Research Design; D019616:Thoracic Surgical Procedures / Q000266:history