1. Department of Medicine, University of Washington, Seattle, Washington
2. Division of STD Prevention, National Center for HIV, STD, and TB Prevention
3. National Center for Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
4. Department of Laboratory Medicine, University of California
5. San Francisco Department of Public Health, San Francisco, California
6. Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama
7. School of Medicine, Indiana University, Indianapolis, Indiana
8. School of Medicine, Louisiana State University Health Sciences Center, New Orleans, Louisiana