1. Laboratory of Cell Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.
2. Current address: Center for Biologics Evaluation and Research, Food and Drug Administration, Bethesda, MD 20892.
3. Laboratory of Experimental Carcinogenesis, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.
4. Gene Silencing Section, Office of Science and Technology Partnerships, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.
5. Genomics and Drug Discovery, Intradigm, Rockville, MD 20852.