[1] NCI, Human Carcinogenesis Lab, Natl Inst Hlth, Ctr Canc Res, Bethesda, MD 20892 USA
[2] NCI, Natl Inst Hlth, Ctr Canc Res,Lab Mol Pharmacol, Genom & Bioinformat Grp, Bethesda, MD 20892 USA
[3] NCI Frederick SAIC Frederick Inc, Adv Biomed Comp Ctr, Frederick, MD USA
[4] Univ Texas MD Anderson Canc Ctr, Dept Sarcoma Med Oncol, Houston, TX USA
[5] Baltimore Vet Affairs Med Ctr, Baltimore, MD USA