1. From the Department of Medicine (C.L.H., M.R.M., T.R.M., T.P., J.D.-A., T.A., S.H.), University of Otago, Christchurch; New Zealand Brain Research Institute (C.L.H., K.-L.H., M.R.M., L.L., T.R.M., D.M., T.P., J.D.-A., T.A.), Christchurch; Department of Neurology (C.L.H., T.A.), Christchurch Hospital; and Department of Psychology (C.L.H., J.D.-A.), Speech and Hearing, University of Canterbury, Christchurch, New Zealand.