1. Department of Periodontology University of Alabama at Birmingham Birmingham Alabama
2. Department of Periodontics University of Pennsylvania Philadelphia Pennsylvania
3. Department of Obstetrics and Gynecology University of Pennsylvania Philadelphia Pennsylvania
4. Department of Obstetrics and Gynecology Ochsner Baptist New Orleans Louisiana
5. Department of Obstetrics and Gynecology, Division of Maternal Fetal Medicine University of Alabama at Birmingham Birmingham Alabama USA
6. Research & Development The Procter & Gamble Company Cincinnati Ohio
7. School of Dentistry University of California San Francisco San Francisco California