@inbook{1120845907,
author={Linda M. Szymanski and Jessica L. Bienstock},
title={Preface},
booktitle={The Johns Hopkins Handbook of Obstetrics and Gynecology},
publisher={McGraw-Hill Education},
address={New York, NY},
year={2015},
url={obgyn.mhmedical.com/content.aspx?aid=1120845907}
}