PO-0721: Short vs protracted urethra-sparing prostate SBRT: feasibility and early toxicity from a randomized phase II trial. (April 2015) - Zilli, T.; Bruynzeel, A.; Minn, H.; Sánchez-Saugar, E.; Oliveira, A.; Bral, S.; Jorcano, S.; Abacioglu, U.; Symon, Z.; Miralbell, R.