[1] Inst Jules Bordet, Brussels, Belgium
[2] Inst Jules Bordet, Brussels, Belgium
[3] Univ Milan, Dept Clin Sci & Community Hlth, Milan, Italy
[4] Hosp Madrid, Norte Sanchinarro, Spain
[5] Roche Prod Ltd, Welwyn Garden City, Herts, England
[6] F Hoffmann La Roche Ltd, Basel, Switzerland
[7] Vall Hebron Inst Oncol, Barcelona, Spain
[8] Heidelberg Univ, Heidelberg, Germany