[1] Canc Res UK, London EC1V 4AD, England
[2] Univ Leeds, NCRN, Leeds, W Yorkshire, England
[3] NCI, Canc Therapy Evaluat Program, Div Canc Treatment & Diag, Bethesda, MD 20892 USA
[4] NCI, Ctr Global Hlth, Bethesda, MD 20892 USA
[5] European Org Res Treatment Canc, Brussels, Belgium