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doi:10.1136/bmj.b2323

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Jonathan D Mayer, professor of epidemiology1

¹University of Washington, Seattle, WA 98195, USA

jmayer{at}u.washington.edu

As a reviewer in several study sections at the US National Institutes of Health, I have noted that it is impossible to replicate sample size and power calculations in the overwhelming number of otherwise excellent research proposals.1 I then noted that replication …