[1] Univ Texas MD Anderson Canc Ctr, Dept Epidemiol, Unit 1365, Houston, TX 77030 USA
[2] Univ Texas MD Anderson Canc Ctr, Sch Hlth Profess, Program Mol Genet Technol, Houston, TX 77030 USA
[3] Univ Texas MD Anderson Canc Ctr, Dept Genet, Houston, TX 77030 USA
[4] Univ Texas MD Anderson Canc Ctr, Dept Mol Pathol, Houston, TX 77030 USA