[1] Edinburgh Canc Ctr, Clin Oncol, Edinburgh, Midlothian, Scotland
[2] Queens Univ Belfast, Belfast City Hosp, Northern Ireland Canc Ctr, Ctr Canc Res & Cell Biol, Belfast, Antrim, North Ireland
[3] Leeds Canc Ctr, St Jamess Inst Oncol, Leeds, W Yorkshire, England
[4] Belfast City Hosp, Northern Ireland Canc Ctr, Belfast, Antrim, North Ireland
[5] Beatson West Scotland Canc Ctr, Glasgow, Lanark, Scotland