1. Charlie Norwood Veterans Affairs Medical Center, Augusta, Georgia
2. Department of Physiology, Medical College of Georgia at Augusta University, Augusta, Georgia
3. Department of Dermatology, Medical College of Georgia at Augusta University, Augusta, Georgia
4. Department of Medicine, Medical College of Georgia at Augusta University, Augusta, Georgia
5. Department of Pathology, Medical College of Georgia at Augusta University, Augusta, Georgia
6. Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama