@inbook{1000179662,
author={Alan H. DeCherney and Lauren Nathan and Neri Laufer and Ashley S. Roman},
title={},
booktitle={CURRENT Diagnosis & Treatment: Obstetrics & Gynecology, 11e},
publisher={The McGraw-Hill Companies},
address={New York, NY},
year={2013},
url={accessmedicine.mhmedical.com/content.aspx?aid=1000179662}
}