1. University of Alabama at Birmingham Marnix E. Heersink School of Medicine, Birmingham, Alabama, USA.
2. Department of Obstetrics and Gynecology, University of Alabama at Birmingham, Birmingham, Alabama, USA.
3. Center for Women's Reproductive Health, Birmingham, Alabama, USA.
4. Division of Hematology/Oncology, Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
5. Division of Cardiovascular Disease, Department of Medicine, University of Alabama at Birmingham, Alabama, USA.