1. Capital Ob/Gyn, Sacramento, CA, USA
2. Clinical and Translational Science Center, University of California, Davis Health, Sacramento, CA, USA
3. Department of Obstetrics and Gynecology, Christiana Care Health System, Newark, DE, USA
4. Department of Family and Community Medicine, Christiana Care Health System, Newark, DE, USA
5. Department of Epidemiology, Biostatistics and Informatics, University of Pennsylvania, Philadelphia, PA, USA