1. Department of Immunology, Walter Reed Army Institute of Research, Washington, DC 20307.
2. Biomedical Research Institute, Rockville, MD 20852.
3. Department of Molecular Genetics, Smith Kline French Laboratories, Swedeland, PA 19479.
4. Biological Resources Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20872.
5. Malaria Branch, Naval Medical Research Institute, Bethesda, MD 20814, and Department of Immunology, Walter Reed Army Institute of Research, Washington, DC 20307.
6. Department of Entomology, Walter Reed Army Institute of Research, Washington, DC 20307.