1. Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, Georgia
2. School of Medicine, Emory University, Atlanta, Georgia
3. Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, New York
4. Albert Einstein College of Medicine and Montefiore Medical Center, New York, New York
5. National Institute for Communicable Diseases, Johannesburg, South Africa
6. Department of Medical Microbiology, School of Medicine, University of Pretoria, Pretoria, South Africa
7. Infectious Diseases Division, Massachusetts General Hospital, Boston, Massachusetts
8. National Health Laboratory Service, Johannesburg, South Africa
9. School of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal, Durban, South Africa
10. Centers for Disease Control and Prevention, Atlanta, Georgia