Levels of evidence and grades of recommendations[J]. Journal of Evidence-Based Medicine, 2003, 3(2): 111-113. DOI: 10.3969/j.issn.1671-5144.2003.02.017
    Citation: Levels of evidence and grades of recommendations[J]. Journal of Evidence-Based Medicine, 2003, 3(2): 111-113. DOI: 10.3969/j.issn.1671-5144.2003.02.017

    Levels of evidence and grades of recommendations

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