DOI:
10.1055/s-00000036
Laryngo-Rhino-Otologie
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References
Howick JCI, Glasziou P, Greenhalgh T, Heneghan C, Liberati A, Moschetti I, Phillips B, Thornton H.
Explanation of the 2011 Oxford Centre for Evidence-Based Medicine (OCEBM) Levels of Evidence (Background Document).
In: Oxford Centre for Evidence-Based Medicine 2011
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