1. Division of Hematology, Department of Medicine, Maimonides Medical Center, Brooklyn, N.Y., and the Department of Medicine, State University of New York, Downstate Medical Center, Brooklyn, N.Y., the Division of Medical Genetics, Department of Pediatrics, Mount Sinai School of Medicine, New York, N.Y., and the National Cancer institute, National Institutes of Health, Bethesda, Md.
2. Department of Medicine, Mainlonides Medical Center, Brooklyn, N.Y.; Clinical Instructor, Department of Medicine, State University of New York, Dotenstate Medical Center, Brooklyn, N.Y.
3. Division of Medical Genetics, Department of Pediatrics, Mount Sinai School of Medicine, New York, N.Y.
4. Molecular Biology Section, Viral Carcinogenesis Branch, National Cancer Institute, National Institutes of Healtil, Bethesda, Md.
5. Division of Hematology, Maimonides Medical Center, Brooklyn, N.Y.; Professor of Medicine, State University of New York, Downstate Medical Center, Brooklyn, N.Y.
6. Arthur J. and Nellie Z. Cohen Professor, Department of Pediatrics; Chief, Division of Medical Genetics, Mount Sinai School of Medicine; New York City Health Research Council Career Scientist 1-513.
7. Department of Medicine, Maimonides Medical Center, Brooklyn, N.Y.
8. Division of Hematology, Department of Medicine, Maimonides Medical Center, Brooklyn, N.Y.; Assistant Professor, Department of Medicine, State University of New York, Downstate Medical Center, Brooklyn, N. Y.