[1] NCI, Basic Res Lab, SAIC Frederick Inc, Lab Genom Divers, Frederick, MD 21702 USA
[2] NIH, Natl Lib Med, NCBI, IEB,Dept Hlth & Human Serv, Bethesda, MD 20894 USA
[3] NIH, Natl Lib Med, NCBI, CBB,Dept Hlth & Human Serv, Bethesda, MD 20894 USA
[4] NCI, Adv Biomed Comp Ctr, Frederick, MD 21702 USA