Table 3.
Cochrane Risk of Bias Assessment and Sackett’s Levels of Evidence.a
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The cells are shaded as follows: white, low risk of bias; gray, unclear risk of bias; black, high risk of bias.
Cochrane Risk of Bias Assessment and Sackett’s Levels of Evidence.a
![]() |
The cells are shaded as follows: white, low risk of bias; gray, unclear risk of bias; black, high risk of bias.