Postprint version. Published in International Journal of Radiation Oncology Biology Physics, Volume 69, Issue 3, Supplement 1, November 1, 2007, pages S646-S647. Copyright © 2007 Elsevier. The definitive version is available at http://dx.doi.org/10.1016/j.ijrobp.2007.07.1988.
NOTE: At the time of publication, the author Dana Paquin was not yet affiliated with Cal Poly.