1. Division of Infectious Disease, School of Medicine, Emory University, Atlanta, Georgia
2. Division of Thoracic Imaging and Intervention, Department of Radiology, Massachusetts General Hospital, Boston, Massachusetts
3. Department of Radiology, School of Medicine, Emory University, Atlanta, Georgia
4. Epidemiology and Statistics Branch, Division of STD Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia
5. Department of Internal Medicine, School of Medicine, Emory University, Atlanta, Georgia