1. Department of Medicine (S.H.G., G.S.W., F.L.B., D.F.), Johns Hopkins University School of Medicine, Baltimore, Maryland 21205
2. Department of Psychiatry (G.S.W.), Johns Hopkins University School of Medicine, Baltimore, Maryland 21205
3. Department of Medicine (S.M.), University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania 15213
4. Department of Epidemiology (S.H.G., F.L.B., D.F.), Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland 21205
5. Department of Radiology (K.H.), Johns Hopkins University School of Medicine, Baltimore, Maryland 21205