@inbook{1209175021, author={Harold C. Sox and Roger J. Lewis}, editor={Livingston, Edward H. and Lewis, Roger J.}, title={Pragmatic Trials: Practical Answers to “Real World” Questions}, booktitle={JAMA Guide to Statistics and Methods}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2019}, url={jamaevidence.mhmedical.com/content.aspx?aid=1209175021} }