Biological Effectiveness of Photons and Electrons as a Function of Energy. Issue 2 (February 2015) - Simon, Steven L.; Braby, Leslie A.; Chang, Polly Y.; Goodhead, Dudley T.; Hora, Stephen; Kocher, David C.; Mabuchi, Kiyohiko; Puskin, Jerome S.; Richardson, David; Rosenstein, Marvin; Tucker, James; Vano, Eliseo