[1] Antoni Van Leeuwenhoek Hosp, Netherlands Canc Inst, Dept Med Oncol, Amsterdam, Netherlands
[2] Univ Med Ctr, Dept Med Oncol, Utrecht, Netherlands
[3] AstraZeneca, Macclesfield, Cheshire, England
[4] Slotervaart Hosp, Dept Pharm & Pharmacol, Amsterdam, Netherlands