[1] Univ Oxford, Oxford Ctr Clin Magnet Resonance Res, Oxford, England
[2] Univ Oxford, Dept Physiol Anat & Genet, Oxford, England
[3] Oxford Univ Hosp, Dept Radiol, Oxford, England
[4] Univ Birmingham, Inst Canc & Genom Sci, Birmingham, W Midlands, England
[5] Univ Bologna, Alama Mata Studorium, Bologna, Italy