1. Biological Carcinogenesis and Development Program, Program Resources Inc., National Cancer Institute-Frederick Cancer Research Facility, Frederick, MD 21701.
2. Laboratory of Biochemistry, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD 20892.
3. Laboratory of Biochemical Physiology, Biological Response Modifiers Program, Division of Cancer Treatment, National Cancer Institute-Frederick Cancer Research Facility, Frederick, MD 21701.