[1] Barts Canc Inst, London, England
[2] Univ Colorado Hosp, London, England
[3] Univ Edinburgh, Edinburgh, Midlothian, Scotland
[4] Inst Canc Res, London SW3 6JB, England
[5] Netherlands Canc Inst, Amsterdam, Netherlands
[6] Guys & St Thomas NHS Fdn Trust, London, England