1. Department of Obstetrics and Gynecology and Center for Women's Reproductive HealthUniversity of Alabama at Birmingham Birmingham AL USA
2. University of Buea Buea Cameroon
3. Cameroon Baptist Convention Health Services Bamenda Cameroon
4. Division of Infectious DiseasesUniversity of Alabama at Birmingham Birmingham AL USA
5. Bamenda Center for Health Promotion and Research Bamenda Cameroon