@inbook{1196006309, author={Jason T. Alexander and Adam S. Cifu}, editor={Livingston, Edward H. and Lewis, Roger J.}, title={Interpreting the ACC/AHA Clinical Practice Guideline Recommendation Classification System}, booktitle={JAMA Guide to Statistics and Methods}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2019}, url={jamaevidence.mhmedical.com/content.aspx?aid=1196006309} }