Diagnostic accuracy and value of magnetic resonance imaging (MRI) in planning exenterative pelvic surgery for advanced colorectal pelvic cancer - Tekkis, PP; Georgiou, PA; Constantinides, VA; Patel, U; Antoniou, A; Goldin, RD; Darzi, AW; Cunningham, D; Nicholls, R; Brown, G (JOURNAL OF CLINICAL ONCOLOGY, 2011)