[1] Netherlands Canc Inst, Dept Med Oncol, Amsterdam, Netherlands
[2] Netherlands Canc Inst, Div Psychosocial Res & Epidemiol, Amsterdam, Netherlands
[3] Inst Canc Res, Div Clin Studies, London, England
[4] Radboud Univ Nijmegen Med Ctr, Dept Med Oncol, Nijmegen, Netherlands