DOI:
10.1055/s-00000085
The Thoracic and Cardiovascular Surgeon
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References
Wells GA, Shea BJ, O'Connell D. , et al.
The Newcastle–Ottawa Scale (NOS) for assessing the quality of non randomized studies in meta-analysis.
Available at:
http://www.ohri.ca/programs/clinicalepidemiology/oxford.asp . Accessed November 10, 2015
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