1 Department of Epidemiology and Biostatistics, College of Human Medicine, Michigan State University, East Lansing (M.J.R.).
2 Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia (S.L.G.).
3 Peritz Scheinberg Cerebral Vascular Disease Research Laboratory, Department of Neurology, Leonard M. Miller School of Medicine, University of Miami, FL (A.P.R.).