1. Dept. of Ob/Gyn, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA.
2. Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA.
3. Dept. of Ob/Gyn, Cedars Sinai Medical Center, Los Angeles, California, USA.
4. Dept. of Medicine, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA.
5. Dept. of Healthcare Organization & Policy, School of Public Health, University of Alabama at Birmingham, Birmingham, Alabama, USA.
6. Dept. of Health Policy, Management, and Behavior, School of Public Health, University at Albany, SUNY, Rensselaer, New York, USA.