[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