@inbook{1141276172, author={Robert T. Jensen}, editor={Jameson, J. Larry}, title={Endocrine Tumors of the Gastrointestinal Tract and Pancreas}, booktitle={Harrison's Endocrinology, 4e}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2017}, url={accessbiomedicalscience.mhmedical.com/content.aspx?aid=1141276172} }