1. Department of Neurology University of Pennsylvania Perelman School of Medicine Philadelphia Pennsylvania USA
2. Translational Center for Excellence for Neuroepidemiology and Neurological Outcomes Research, Department of Neurology University of Pennsylvania Perelman School of Medicine Philadelphia Pennsylvania USA
3. Center for Clinical Epidemiology and Biostatistics, Department of Biostatistics, Epidemiology, and Informatics University of Pennsylvania Perelman School of Medicine Philadelphia Pennsylvania USA
4. Center for Pharmacoepidemiology Research and Training, Department of Biostatistics, Epidemiology, and Informatics University of Pennsylvania Perelman School of Medicine Philadelphia Pennsylvania USA
5. Center for Therapeutic Effectiveness Research, Department of Biostatistics, Epidemiology, and Informatics University of Pennsylvania Perelman School of Medicine Philadelphia Pennsylvania USA
6. Leonard Davis Institute of Health Economics, University of Pennsylvania Philadelphia Pennsylvania USA
7. Department of Neurology Hospital of the University of Pennsylvania Philadelphia Pennsylvania USA