[1] Ottawa Reg Canc Ctr, Ottawa, ON K1Y 4K7, Canada
[2] Univ Ottawa, Ottawa Hosp Canc Ctr, Ottawa, ON, Canada
[3] Univ Colorado, Ctr Canc, Med Oncol Ucdhsc, Aurora, CO USA
[4] Pfizer Inc, Oncol, La Jolla, CA USA
[5] Pfizer Inc, Global Res & Dev, La Jolla, CA USA