[1] Ohio State Univ, Ctr Comprehens Canc, Columbus, OH 43210 USA
[2] Tufts Univ, New England Med Ctr, Mol Oncol Res Inst, Boston, MA 02111 USA
[3] Univ Naples 2, Sch Med, Dept Biochem & Biophys F Cedrangolo, Naples, Italy
[4] Univ Ferrara, Dept Expt & Diagnost Med, I-44100 Ferrara, Italy
[5] Univ Ferrara, Interdept Ctr Canc Res, I-44100 Ferrara, Italy
[6] Univ Texas, MD Anderson Canc Ctr, Dept Canc Genet, Houston, TX 77030 USA
[7] Univ Texas, MD Anderson Canc Ctr, Dept Expt Therapeut, Houston, TX 77030 USA