From the Departments of Health Policy and Management and of Epidemiology, School of Hygiene and Public Health, and the Department of Medicine, School of Medicine, The Johns Hopkins University, Baltimore, Maryland. Supported by grants from the Agency for Health Care Policy and Research (HS07824-01), The Johns Hopkins University Adult Clinical Trials Unit Grant U01 A1 38858, and the Adult AIDS Clinical Trials Group of the National Institute of Allergy and Infectious Diseases, Cooperative Agreement No. U01 AI38858. Address correspondence and reprint requests to: Albert W. Wu, MD, MPH, Health Services Research and Development Center, 624 N Broadway, Baltimore, MD 21205. E-Mail: [email protected]
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