@inbook{5266690,
author={C. William Hanson III},
title={Chapter 53. Doppler Evaluation of Pulses},
booktitle={Procedures in Critical Care},
publisher={The McGraw-Hill Companies},
address={New York, NY},
year={2009},
url={accessanesthesiology.mhmedical.com/content.aspx?aid=5266690}
}