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  • ARTICLE November 10, 1993

    Steven A. Grover, MD, MPA, FRCPC; Alan N. Barkun, MD, FRCPC; David L. Sackett, FRSC, MD, FRCPC

    JAMA. 1993; 270(18):2218-2221. doi: 10.1001/jama.1993.03510180088040