1. Division of HIV, Infectious Diseases and Global Medicine, Department of Medicine, University of California, San Francisco, San Francisco, California (M.G., M.H., E.I., J.G., F.M., J.D.S., J.O., M.S., J. Salazar, S.D., J.Q.N., D.V.H., K.A.C.)
2. Center for AIDS Prevention Studies, Department of Medicine, University of California, San Francisco, San Francisco, California (J. Sauceda)
3. Department of Epidemiology and Biostatistics, Department of Medicine, University of California, San Francisco, San Francisco, California (D.V.G.).