Institution: | 1. Immunology, World Health Organization, 1211 Geneva 27, Switzerland;2. The San Francisco V.A. Hospital U.S.A.;3. The Laboratory of Radiobiology, University of California Medical Centre, San Francisco, California 94122, USA;4. Section of Haematology and Immunology, University of California Medical Centre, San Francisco, California 94122, USA;5. Department of Anatomy, Hebrew University-Hadassah Medical School, Jerusalem, Israel |