@inbook{56206438, author={Linda S. Lee, MD}, editor={McKean, Sylvia C. and Ross, John J. and Dressler, Daniel D. and Brotman, Daniel J. and Ginsberg, Jeffrey S.}, title={Chapter 160. Acute Lower Gastrointestinal Bleeding}, 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=56206438} }