Dose-volume constraints to reduce rectal side effects from prostate radiotherapy: evidence from MRC RT01 Trial ISRCTN 47772397. by Gulliford, S, Foo, K, Morgan, R, Aird, E, Bidmead, A, Critchley, H, Evans, P, Gianolini, S, Mayles, W, Moore, A, Sánchez-Nieto, B, Partridge, M, Sydes, MR, Webb, S, Dearnaley, D