[1] Univ Texas, SW Med Ctr, Simmons Canc Ctr, Dept Med,Div Hematol Oncol, Dallas, TX USA
[2] Univ Texas, SW Med Ctr, Hamon Ctr Therapeut Oncol Res, Dallas, TX USA
[3] Univ Texas, SW Med Ctr, Dept Pathol, Dallas, TX USA
[4] Univ Pittsburgh, Inst Canc, Dept Med, Pittsburgh, PA 15260 USA
[5] Univ Pittsburgh, Inst Canc, Dept Pharmacol, Pittsburgh, PA 15260 USA