@inbook{1100435601, author={Robert M. Arensman and Daniel J. Stephens}, editor={Ziegler, Moritz M. and Azizkhan, Richard G. and Allmen, Daniel von and Weber, Thomas R.}, title={Common Acquired Anorectal Problems of Childhood}, booktitle={Operative Pediatric Surgery, 2e}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2014}, url={accesssurgery.mhmedical.com/content.aspx?aid=1100435601} }