@inbook{8551944,
author={John D. Wasnick and Zak Hillel and David Kramer and Sanford Littwin and Alina Nicoara},
title={Introduction to Perioperative Echocardiography},
booktitle={Cardiac Anesthesia and Transesophageal Echocardiography},
publisher={The McGraw-Hill Companies},
address={New York, NY},
year={2011},
url={accessanesthesiology.mhmedical.com/content.aspx?aid=8551944}
}