1. Laboratory of Tumor Cell Biology, National Cancer Institute, Bethesda, Maryland 20205
2. Immunology Branch, National Cancer Institute
3. Division of Infectious Diseases, North Shore University Hospital, Manhusset, New York 11030
4. Department of Medicine, Duke University School of Medicine, Durham, North Carolina 27710
5. Department of Virus Diseases, Walter Reed Army Institute of Research, Washington, D.C. 20012
6. Division of Allergy, Immunology, and Infectious Disease, University of Medicine and Dentistry of New Jersey, Newark 07103
7. Dermatology Service, Memorial Sloan Kettering Cancer Center, New York 10021
8. Department of Medicine, University of North Carolina, Chapel Hill 27514
9. Department of Cell Biology, Litton Bionetics, Inc., Kensington, Maryland 20895