@inbook{1105830157,
author={W. Thomas Gregory and Milena M. Weinstein},
editor={Rogers, Rebecca G. and Sung, Vivian W. and Iglesia, Cheryl B. and Thakar, Ranee},
title={Anorectal Investigations},
booktitle={Female Pelvic Medicine and Reconstructive Surgery: Clinical Practice and Surgical Atlas},
publisher={McGraw-Hill Education},
address={New York, NY},
year={2014},
url={obgyn.mhmedical.com/content.aspx?aid=1105830157}
}