1. Department of Epidemiology, University of Alabama at Birmingham2Department of Medicine, University of Alabama at Birmingham
2. Department of Epidemiology, University of Alabama at Birmingham
3. Department of Medicine, University of Vermont, Burlington
4. Department of Epidemiology, Colorado School of Public Health, Aurora
5. Department of Biostatistics, University of Alabama at Birmingham
6. Department of Neurology and Rehabilitation Medicine, University of Cincinnati, Cincinnati, Ohio
7. Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois
8. Department of Medicine, University of Alabama at Birmingham