1. From the Departments of Radiology (I.B., M.S., G.S., A.S.C., C.C.L.), Cardiology (S.M.), Family Medicine (J.G.B., B.T.), Microbiology (C.T.) and Internal Medicine (M.D.), University of Montreal Hospital (CHUM), 1051 Sanguinet St, Montréal, QC, Canada H2X 0C1; and Department of Radiology, Providence Health Care, Vancouver, Canada (J.L.). Members of the Canadian HIV and Aging Cohort Study Group are listed in the acknowledgments.