@inbook{1000658453, author={Joseph Lex}, title={Obstetric and Gynecologic Emergencies}, booktitle={Emergency Medicine Q&A: Pearls of Wisdom, 3e}, publisher={The McGraw-Hill Companies}, address={New York, NY}, year={2013}, url={accessemergencymedicine.mhmedical.com/content.aspx?aid=1000658453} }