用户对医学文献的指南：IX。一种评级医疗保健建议的方法

From the Departments of Medicine (Drs Guyatt, Hayward, and D. J. Cook) and Clinical Epidemiology and Biostatistics(DrsGuyatt, Hayward, D. J. Cook, and Sinclair), and the Department of Pediatrics (Dr Sinclair), McMaster University, McMaster University Faculty of Health Sciences, Hamilton, Ontario; the Centre for Evidence-Based Medicine, Nuffield Department of Medicine, University of Oxford (England) (Dr Sackett); and the Department of Statistics and Actuarial Sciences, Faculty of Mathematics, University of Waterloo (Ontario) (Dr R. J. Cook).