1. Critical Care Medicine Department, NIH Clinical Center, National Institutes of Health, Bethesda, Maryland.
2. Laboratory of Pathology, National Cancer Institute, National Institutes of Health, Bethesda, Maryland.
3. Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland.
4. Clinical Research Directorate/Clinical Monitoring Research Program, Leidos Biomedical Research, Inc. (formerly SAIC-Frederick, Inc.), Frederick National Laboratory for Cancer Research, Frederick, Maryland.
5. Infectious Diseases Section, Medical Service, Veterans Affairs Medical Center, Washington, District of Columbia.
6. NIH Clinical Center Nursing Department, National Institutes of Health, Bethesda, Maryland.
7. Division of Infectious Diseases, The George Washington University Medical Center, Washington, District of Columbia.