@inbook{56854335, author={Amandeep Shergill, MD and Kenneth R. McQuaid, MD}, editor={Henderson, Mark C. and Tierney, Lawrence M. and Smetana, Gerald W.}, title={Chapter 36. Acute Gastrointestinal Bleeding}, booktitle={The Patient History: An Evidence-Based Approach to Differential Diagnosis, 2e}, publisher={The McGraw-Hill Companies}, address={New York, NY}, year={2012}, url={accessmedicine.mhmedical.com/content.aspx?aid=56854335} }