1. Biological Carcinogenesis and Development Program, Program Resources, Inc./DynCorp, National Cancer Institute, Frederick Cancer Research and Development Center, Frederick, MD 21702.
2. Eukaryotic Signal Transduction Group, Advanced Bioscience Laboratory- Basic Research Program, National Cancer Institute, Frederick Cancer Research and Development Center, Frederick, MD 21702.
3. Laboratory of Biochemical Physiology, NCI, Frederick Cancer Research and Development Center, Frederick, MD 21702.