[1] Addenbrookes Hosp, Dept Oncol R4, Cambridge Biomed Res Ctr, Cambridge CB2 0QQ, England
[2] Inst Canc Res, Div Canc Biol, London SW3 6JB, England
[3] Christie Hosp, Dept Med Oncol, Manchester M20 4BX, Lancs, England
[4] Inst Gustave Roussy, Dept Med, F-94805 Villejuif, France
[5] Southampton Univ Hosp, Canc Sci Div, Southampton SO16 6YD, Hants, England
[6] Inst Claudius Regaud, Dept Med Oncol, F-31052 Toulouse, France
[7] Royal Free Hosp, Canc Serv Div, London NW3 2QG, England
[8] Mt Vernon Canc Ctr, Canc Serv Div, Northwood HA6 2RN, Middx, England
[9] Hop St Andre, Dept Dermatol, F-33075 Bordeaux, France
[10] Guys & St Thomas Hosp, Canc Serv Div, London SE1 7EH, England
[11] Ctr Leon Berard, F-39373 Lyon, France
[12] Bayer PLC, Newbury RG14 1JA, Berks, England
[13] Royal Marsden Hosp, Dept Med, London SW3 6JJ, England
[14] Bayer Schering Pharma, D-51368 Leverkusen, Germany