Are meta-analyses producing more controversy than answers?
A recent article from Science explores how meta-analyses may be less authoritative than they seem.
The elimination of negative study results: reporting and citation bias
Is the apparent efficacy of treatments being altered by bias? A recent study takes a closer look at the cumulative effects of reporting and citation biases.
Textbooks: at risk of being biased and outdated?
Dr Richard Smith reviews the potential pitfalls of textbooks in a recent opinion piece for The BMJ.