[1] UCL, Div Surg & Intervent Sci, London WC1E 6BT, England
[2] Pelican Canc Fdn, Basingstoke, Hants, England
[3] Inst Canc Res, Sect Acad Radiotherapy, Sutton, Surrey, England
[4] Inst Canc Res, Dept Radiotherapy, Sutton, Surrey, England
[5] Royal Marsden Hosp, Sutton, Surrey, England
[6] Royal Marsden NHS Fdn Trust, Acad Unit Radiotherapy & Oncol, Sutton, Surrey, England
[7] Mem Sloan Kettering Canc Ctr, Dept Radiol, New York, NY 10021 USA
[8] Mem Sloan Kettering Canc Ctr, Surg Urol Serv, New York, NY 10021 USA
[9] Cleveland Clin, Dept Quantitat Hlth Sci, Cleveland, OH 44106 USA
[10] Duke Univ, Med Ctr, Duke Canc Inst, Durham, NC 27706 USA
[11] Univ Calif San Francisco, Dept Radiol & Biomed Imaging, San Francisco, CA 94143 USA
[12] Univ British Columbia, Dept Urol Sci, Gordon & Leslie Diamond Hlth Care Ctr, Vancouver, BC V5Z 1M9, Canada
[13] CHRU Lille, Hop Huriez, Serv Urol, Lille, France