Johnstone Peter A S, McMullen Kevin P, Buchsbaum Jeffrey C, Douglas James G, Helft Paul
Melvin & Bren Simon Cancer Center, Indiana University School of Medicine, Indianapolis, Indiana 46202, USA.
Int J Radiat Oncol Biol Phys. 2013 Oct 1;87(2):228-30. doi: 10.1016/j.ijrobp.2013.05.037.