@inbook{56207445, author={Melissa Mattison, MD, SFHM, FACP}, editor={McKean, Sylvia C. and Ross, John J. and Dressler, Daniel D. and Brotman, Daniel J. and Ginsberg, Jeffrey S.}, title={Chapter 168. Functional Decline}, booktitle={Principles and Practice of Hospital Medicine}, publisher={The McGraw-Hill Companies}, address={New York, NY}, year={2012}, url={accessmedicine.mhmedical.com/content.aspx?aid=56207445} }