1. Department of Epidemiology, School of Public Health, University of Alabama at Birmingham, AL, USA
2. Department of Medicine, Division of Infectious Diseases, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
3. Division of Epidemiology, Vanderbilt University Medical Center, Nashville, TN, USA
4. O’Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL, USA
5. Department of Pathology, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA