Michael Zelefsky On Radiation Therapy August 8, 2016 by Prostatepedia Leave a comment Watch a 2015 presentation Dr. Michael Zelefsky gave at the 25th International Prostate Cancer Update in 2015 on the present and future of radiation therapy for prostate cancer. Share this:TwitterFacebookLike this:Like Loading... Related Author: Prostatepedia Conversations about prostate cancer.