1. Wyeth Vaccines Research, Pearl River, New York 10965.
2. Department of Pathology, Yale University School of Medicine, New Haven, Connecticut 06510.
3. New Iberia Research Center, University of Louisiana at Lafayette, New Iberia, Louisiana 70560.
4. Current address: Bioject Medical Technologies, Inc., Bedminster, New Jersey 07921.
5. Department of Surgery, Duke University Medical Center, Durham, North Carolina 27710.
6. Division of Retrovirology, Walter Reed Army Institute of Research and Henry M. Jackson Foundation, Rockville, Maryland 20850.
7. Tulane Regional Primate Center and Department of Tropical Medicine, Tulane University Health Sciences Center, Covington, Louisiana 70433.