@inbook{1159950708,
author={Alan H. DeCherney and Lauren Nathan and Neri Laufer and Ashley S. Roman},
title={Preface},
booktitle={CURRENT Diagnosis & Treatment: Obstetrics & Gynecology, 12e},
publisher={McGraw-Hill Education},
address={New York, NY},
year={2019},
url={obgyn.mhmedical.com/content.aspx?aid=1159950708}
}