Evidence-basedmedicineclassifiesclinicalevidenceinto： A: evidenceforobservationalandexperimentalstudies B: originalresearchevidenceandsecondaryresearchevidence C: evidencefor diagnostic,therapeuticandprognosticstudies D: evidenceforprospectiveandretrospectivestudies
Evidence-basedmedicineclassifiesclinicalevidenceinto： A: evidenceforobservationalandexperimentalstudies B: originalresearchevidenceandsecondaryresearchevidence C: evidencefor diagnostic,therapeuticandprognosticstudies D: evidenceforprospectiveandretrospectivestudies
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