1. Department of Medicine (Clinical Pharmacology), Johns Hopkins University, Baltimore, Maryland.
2. Department of Biostatistics, Johns Hopkins School of Public Health, Baltimore, Maryland.
3. Department of Radiology, Johns Hopkins School of Medicine, Baltimore, Maryland.
4. Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania.
5. HJF-DAIDS, a Division of The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Contractor to National Institute of Allergy and Infectious Diseases, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland.
6. Magee-Womens Research Institute, Pittsburgh, Pennsylvania.