[1] Univ Texas MD Anderson Canc Ctr, Dept Biochem & Mol Biol, Houston, TX 77030 USA
[2] Univ Texas MD Anderson Canc Ctr, Genetically Engn Mouse Facil, Houston, TX 77030 USA
[3] Univ Texas MD Anderson Canc Ctr, Dept Vet Med & Surg, Houston, TX 77030 USA
[4] Univ Texas MD Anderson Canc Ctr, Dept Biostat, Houston, TX 77030 USA