@inbook{1000094130,
author={Carol A. Warfield and Zahid H. Bajwa},
title={A. Pain Practice},
booktitle={Principles & Practice of Pain Medicine, 2e},
publisher={The McGraw-Hill Companies},
address={New York, NY},
year={2004},
url={accessanesthesiology.mhmedical.com/content.aspx?aid=1000094130}
}