However, he cautioned that SBRT needed further study in scientific trials to fully capture survival and quality of life measures. ‘Prostate cancer may be the number one cancer diagnosed in males. I applaud MEDCAC for studying this important concern and appreciate the opportunity to take part in the discussion board,’ Dr. Zietman said.. ASTRO President speaks on radiation therapy for treatment of prostate cancers at MEDCAC meeting ASTRO President Anthony Zietman, M.D., spoke prior to the Medicare Evidence Advancement and Coverage Advisory Committee meeting today on radiation therapy for treatment of localized prostate cancers. MEDCAC provides assistance and suggestions to the Centers for Medicare and Medicaid Solutions for what is covered by Medicare and Medicaid, based on scientific evidence.Yadav, Ph.D., Angel A. Alvarez, B.Sc., Jaclyn J. Renfrow, M.A., James P. Chandler, M.D., Irene L.Y. Yu, M.Sc., Maria S. Carro, Ph.D., Fangping Dai, M.D., Michael J. Tagge, B.Sc., Roberto Ferrarese, Ph.D., Claudia Bredel, Ph.D., Heidi S. Phillips, Ph.D., Paul J. Lukac, B.Sc., Pierre A. Robe, M.D., Ph.D., Astrid Weyerbrock, M.D., Hannes Vogel, M.D., Steven Dubner, M.D., Bret Mobley, M.D., Xiaolin He, Ph.D., Adrienne C. Scheck, Ph.D., Branimir I. Sikic, M.D., Kenneth D. Aldape, M.D., Arnab Chakravarti, M.D., and Griffith R.