[1] Portuguese Oncol Inst, Dept Med Oncol, P-4200072 Oporto, Portugal
[2] Univ Porto FMUP, Fac Med, Dept Med, P-4200319 Oporto, Portugal
[3] Royal Marsden NHS Fdn Trust, Dept Med, London SW3 6JJ, England
[4] Univ Porto, ICBAS, P-4100 Oporto, Portugal
[5] IBMC, Oporto, Portugal
[6] Univ Porto, Fac Med, Dept Pharmacol & Therapeut, P-4200319 Oporto, Portugal
[7] Univ London Imperial Coll Sci Technol & Med, Mol Genet & Genom Grp, London, England