1. University of California, San Francisco, California
2. University of Alabama, Birmingham, Alabama
3. Louisiana State University Medical Center, New Orleans, Louisiana
4. Florida State Department of Health, Jacksonville, Florida
5. Planned Parenthood Foundation of Houston and Southeast Texas, Houston, Texas
6. Wishard Memorial Hospital, Indianapolis, Indiana
7. Magee-Womens Research Institute, Pittsburgh, Pennsylvania
8. University of Illinois, Chicago, Illinois
9. St. Joseph's Health Care Regional Virology and Chlamydiology Laboratory, Hamilton, Ontario, Canada