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J Bone Joint Surg Am. 2007 May;89(5):1128-30.

A practical guide to assigning levels of evidence.

Author information

1
The Hospital for Sick Children, 555 University Avenue, Toronto, ON M5G 1X8, Canada. james.wright@sickkids.ca
PMID:
17473152
DOI:
10.2106/JBJS.F.01380
[Indexed for MEDLINE]

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