Affiliation: | 1. Mast Cell Biology Section, 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. Biostatistics Research Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda; Md;4. Clinical Monitoring Research Program Directorate, Frederick National Laboratory for Cancer Research, Frederick, Md;5. Department of Nursing, Clinical Center, National Institutes of Health, Bethesda, Md |