1. Division of STD Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia
2. Public Health Ontario, Toronto, Canada
3. Association of Public Health Laboratories, Silver Spring, Maryland
4. Emory University, Department of Medicine, Atlanta, Georgia
5. Division of Healthcare Quality Promotion, Centers for Disease Control and Prevention, Atlanta, Georgia
6. Department of Medicine, Harvard Medical School, Boston
7. Department of Pathology, Massachusetts General Hospital, Harvard Medical School, Boston