From the Department of Clinical Epidemiology and Biostatistics and the Department of Medicine, McMaster University, Hamilton, Ontario, Canada. Address correspondence to: Dr. G. Guyatt, Room 2C12, McMaster University Health Sciences Centre, 1200 Main Street West, Hamilton, Ontario, Canada L8N 3Z5. E-mail: [email protected]
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Gordon Guyatt (2000) studied this question.
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