[1] Univ Oxford, Oxford, England
[2] Clin Trial Serv Unit CTSU, Oxford, England
[3] Karolinska Univ Hosp, Karolinska Inst, Stockholm, Sweden
[4] SweBCG, Stockholm, Sweden
[5] Sunnybrook Odette Canc Ctr, Toronto, ON, Canada
[6] Royal Marsden Hosp, London, England
[7] Inst Canc Res, London, England
[8] Univ Michigan, Comprehens Canc Ctr, Ann Arbor, MI 48109 USA