@inbook{3493991,
author={David L. Simel and Sumant R. Ranji and L. Elizabeth Goldman and David L. Simel and Kaveh G. Shojania},
editor={Simel, David L. and Rennie, Drummond},
title={Opiates and Abdominal Pain},
booktitle={The Rational Clinical Examination: Evidence-Based Clinical Diagnosis},
publisher={McGraw-Hill Education},
address={New York, NY},
year={2016},
url={jamaevidence.mhmedical.com/content.aspx?aid=3493991}
}