1. Department of Neurology (A.L.C.S.), Perelman School of Medicine at the University of Pennsylvania, Phildelphia.
2. Department of Biostatistics, Epidemiology and Informatics (A.L.C.S.), Perelman School of Medicine at the University of Pennsylvania, Phildelphia.
3. San Francisco Veterans Affairs Health System, CA (C.B.P., Y.L., A.B., R.C.G., K.Y.).
4. Department of Neurology (R.C.G., K.Y.), Department of Epidemiology and Biostatistics (K.Y.), University of California San Francisco.
5. The Joseph Sagol Neuroscience Center, Sheba Medical Center, Tel Hashomer, Israel (R.C.G.).
6. Department of Psychiatry (K.Y.), University of California San Francisco.