DOI: 10.1055/s-00000099

Zeitschrift für Orthopädie und Unfallchirurgie

References

Wells G, Shea B, OʼConnell D. et al.
The Newcastle–Ottawa Scale (NOS) for assessing the quality of nonrandomised studies in meta-analyses. 2008.
Im Internet:
http://www.ohri.ca/programs/clinical_epidemiology/oxford.asp Stand: 01.06.2018

Wells G, Shea B, OʼConnell D. et al.
The Newcastle–Ottawa Scale (NOS) for assessing the quality of nonrandomised studies in meta-analyses. 2008.
Im Internet:
http://www.ohri.ca/programs/clinical_epidemiology/oxford.asp Stand: 01.06.2018

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