[1] Univ Massachusetts, Sch Med, Program Gene Funct & Express, Worcester, MA 01605 USA
[2] Univ Massachusetts, Sch Med, Program Mol Med, Worcester, MA 01605 USA
[3] Univ Massachusetts, Sch Med, Dept Canc Biol, Worcester, MA 01605 USA
[4] Univ Massachusetts, Sch Med, Ctr Canc, Worcester, MA 01605 USA
[5] Mem Sloan Kettering Canc Ctr, Dept Pathol, New York, NY 10021 USA