Affiliation: | 1. Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Md;2. Hematology Section, Department of Laboratory Medicine, Clinical Center, National Institutes of Health, Bethesda, Md;3. Department of Nursing, Clinical Center, National Institutes of Health, Bethesda, Md;4. Office of Blood Research and Review, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, Md |