DOI: 10.1055/s-00000099

Zeitschrift für Orthopädie und Unfallchirurgie

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References

Centre for Evidence-Based Medicine.
Oxford Centre for Evidence-based Medicine – Levels for Evidence (March 2009).
Im Internet:
https://www.cebm.net/2009/06/oxford-centre-evidence-based-medicine-levels-evidence-march-2009 Stand. 19.03.2019

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