@inbook{3414745,
author={Harriët Wittink and Leonidas C. Goudas and Scott Strassels and Daniel B. Carr},
editor={Warfield, Carol A. and Bajwa, Zahid H.},
title={Chapter 7. Outcome Measurements in Pain Medicine},
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=3414745}
}