[1] Hosp Santa Maria, Lisbon, Portugal
[2] Inst Med Mol, Lisbon, Portugal
[3] Univ Paris Sud, Inst Gustave Roussy, Villejuif, France
[4] Univ Montreal Hosp Ctr, CRCHUM, Montreal, PQ, Canada
[5] Canc Res UK Clin Ctr, Leeds, W Yorkshire, England
[6] Kantonsspital Graubunden, Chur, Switzerland
[7] Georges Pompidou European Hosp, Paris, France
[8] San Camillo Forlanini Hosp, Rome, Italy
[9] Peninsula Oncol Ctr, Frankston, Australia
[10] Charite, D-13353 Berlin, Germany
[11] Amgen Inc, Thousand Oaks, CA 91320 USA