[1] Univ Coll Dublin, Dept Hlth Oncol Affairs Europe, Dublin, Ireland
[2] Aarhus Univ Hosp, Dept Expt Clin Oncol, Noerrebrogade 44,Bldg 5, DK-8000 Aarhus C, Denmark
[3] Doncaster & Bassetlaw Teaching Hosp NHS Fdn Trust, Dept Oncol & Metab, Doncaster, England
[4] Gloucestershire Hosp NHS Fdn Trust, Dept Clin Oncol, Gloucester, England