BERKELEY, CA (UroToday.com) - In our recent article, we reported the outcome of hypofractionated proton boost of 20 Gy, in daily 5 Gy fractions, combined with external beam radiotherapy (EBRT) of 50 Gy, in daily 2 Gy fractions, for 63 low-risk, 95 intermediate-risk and 107 high-risk prostate cancer (PC) patients.