1. Department of Medicine, Emory University School of Medicine , Atlanta, GA , USA
2. Division of Infectious Diseases, Department of Medicine, Emory University School of Medicine , Atlanta, GA , USA
3. Georgia Emerging Infections Program , Atlanta, GA , USA
4. Atlanta Veterans Affairs Medical Center , Decatur, GA , USA
5. Department of Pathology and Laboratory Medicine, Emory University School of Medicine , Atlanta, GA , USA