@inbook{1106711039, author={Hans Peter Dietz}, editor={Fleischer, Arthur C. and Toy, Eugene C. and Lee, Wesley and Manning, Frank A. and Romero, Roberto J.}, title={PELVIC FLOOR ULTRASOUND}, booktitle={Sonography in Obstetrics and Gynecology: Principles & Practice, 7e}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2015}, url={obgyn.mhmedical.com/content.aspx?aid=1106711039} }