Department of Neurology, University of Pennsylvania School of Medicine, Philadelphia, PA, USA.
Department of Neurology Translational Center for Excellence for Neuroepidemiology and Neurological Outcomes Research, University of Pennsylvania School of Medicine, Philadelphia, PA, USA.
Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania School of Medicine, Philadelphia, PA, USA.
Department of Biostatics, Epidemiology, and Informatics, University of Pennsylvania School of Medicine, Philadelphia, PA, USA.