@inbook{1183607497,
author={Jake Engel and Michael Pratte},
title={Active management superior to expectant management for persisting pregnancy of unknown location},
booktitle={2 Minute Medicine},
publisher={McGraw Hill},
address={New York, NY},
year={2015},
url={accessmedicine.mhmedical.com/updatesContent.aspx?gbosid=568867}
}