[1] UCL, Dept Surg & Intervent Sci, London, England
[2] Univ Coll Hosp, Dept Histopathol, London, England
[3] Royal Marsden Hosp, Dept Radiol, London SW3 6JJ, England
[4] Univ Coll Hosp, Dept Radiol, London, England
[5] UCL, Div Surg & Intervent Sci, London, England