@inbook{7036167, author={Neelesh A. Tipnis}, editor={Rudolph, Colin D. and Rudolph, Abraham M. and Lister, George E. and First, Lewis R. and Gershon, Anne A.}, title={Chapter 393. Disorders of Esophageal Motility}, booktitle={Rudolph's Pediatrics, 22e}, publisher={The McGraw-Hill Companies}, address={New York, NY}, year={2011}, url={accesspediatrics.mhmedical.com/content.aspx?aid=7036167} }