[1] Dana Farber Canc Inst, Boston, MA 02115 USA
[2] Pfizer Global Res & Dev, La Jolla, CA USA
[3] Univ S Florida, Coll Med, H Lee Moffitt Canc Ctr & Res Inst, Tampa, FL 33612 USA
[4] Univ Hosp Gasthuisberg, B-3000 Louvain, Belgium
[5] Univ Toronto, Toronto, ON, Canada
[6] Mt Sinai Hosp, Toronto, ON M5G 1X5, Canada
[7] Ohio State Univ, Ctr Comprehens Canc, Columbus, OH 43210 USA
[8] Erasmus Univ, Med Ctr, Rotterdam, Netherlands
[9] Ist Nazl Tumori, I-20133 Milan, Italy