DOI:
10.1055/s-00000085
The Thoracic and Cardiovascular Surgeon
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References
Wells GA, Shea B, O' Connell D. , et al.
The Newcastle-Ottawa scale (NOS) for assessing the quality of nonrandomized studies in meta-analyses.
Available at:
http://www.ohri.ca/programs/clinical_epidemiology/oxford.asp . Accessed April 25, 2017
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