[1] Royal Marsden Hosp Sutton, GI Lymphoma Unit, Sutton, Surrey, England
[2] Univ Hosp Derby & Burton NHS Fdn, Oncol Dept, Royal Derby Hosp, Derby, England
[3] Univ Hosp Coventry Univ Hosp Coventry & Warwicksh, Oncol, Coventry, W Midlands, England
[4] Royal Sussex Cty Hosp, Dept Oncol, Sussex Canc Ctr, Brighton, E Sussex, England
[5] Sheffield Teaching Hosp NHS Fdn Trust, Oncol Dept, Weston Pk Hosp, Sheffield, S Yorkshire, England
[6] Christie NHS Fdn Trust, Med Oncol, Manchester, England
[7] Newcastle Tyne Hosp NHS Fdn Trust, Clin Oncol, Newcastle Upon Tyne, Tyne & Wear, England