@inbook{1182907207, author={Katja Kovacic and Adrian Miranda}, editor={Kline, Mark W.}, title={Chronic Abdominal Pain}, booktitle={Rudolph's Pediatrics, 23e}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2018}, url={accesspediatrics.mhmedical.com/content.aspx?aid=1182907207} }