A viable approach to addressing the quality of primary studies included in a meta-analysis is:
A) Ignoring the problem of quality by using all studies, regardless of rigor
B) Doing sensitivity analyses to assess whether the effects change when low-quality studies are included
C) Using a random effects model rather than a fixed effects model
D) Using a funnel plot to assess the degree to which study quality is related to effect size
Question 2
Searching for studies in the gray literature represents a reviewer's effort to:
A) Counteract the effect of biases against the null hypothesis
B) Increase sample size and therefore have a more comprehensive evidence base
C) Minimize the risk of publication bias
D) All of the above
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