National Cerebral and Cardiovascular Center Research Institute - Department of Preventive Medicine and Epidemiology, National Cerebral and Cardiovascular Center Research Institute, National Cerebral and Cardiovascular Center Research Institute - Department of Preventive Medicine and Epidemiology, University of Michigan at Ann Arbor, Louisiana State University, Baton Rouge, Emory University, Methodist Charlton Medical Center, Cleveland Clinic, National Cerebral and Cardiovascular Center Research Institute - Department of Biostatistics and University of Michigan at Ann Arbor - Department of Emergency Medicine