@inbook{1184195425, author={Amir A. Ghaferi and Justin B. Dimick}, editor={Livingston, Edward H. and Lewis, Roger J.}, title={Practical Guide to Surgical Data Sets: Medicare Claims Data}, booktitle={JAMA Guide to Statistics and Methods}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2019}, url={jamaevidence.mhmedical.com/content.aspx?aid=1184195425} }