Jacquelyn W. Zimmerman, Michael J. Pennison, Ivan Brezovich, Nengjun Yi, Celeste T. Yang, Ryne Ramaker, Devin Absher, Richard M. Myers, Niels Kuster, Frederico P. Costa, Alexandre Barbault, and Boris Pasche, British Journal of Cancer, Volume 106, Issue 2, pp. 307–313, January 17, 2012. Online December 1, 2011