[1] Dana Farber Canc Inst, Boston, MA 02115 USA
[2] Princess Margaret Canc Ctr, Toronto, ON, Canada
[3] Churchill Hosp, Oxford Canc & Haematol Ctr, Oxford, England
[4] Barbara Ann Karmanos Canc Inst, Detroit, MI USA
[5] Univ Calif Los Angeles, Med Ctr, Los Angeles, CA 90024 USA
[6] Bristol Myers Squibb, Princeton, NJ USA
[7] Mayo Clin, Div Hematol, Rochester, MN USA