1. School of Health Sciences, Walden University, Minneapolis, Minnesota.
2. Department of Obstetrics and Gynecology, University of Chicago, Chicago, Illinois.
3. Department of Obstetrics and Gynecology, Tufts Medical Center, Boston, Massachusetts.
4. Department of Obstetrics and Gynecology, The Methodist Hospital, Houston, Texas.
5. Departments of Pathology, Obstetrics and Gynecology, Duke University Medical Center, Durham, North Carolina.
6. Departments of Obstetrics and Gynecology, Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas.