1. Department of Obstetrics & Gynecology, University of Utah Health, Salt Lake City, UT, USA
2. Department of Obstetrics & Gynecology, Intermountain Healthcare, Murray, UT, USA
3. Department of Obstetrics & Gynecology, Indiana University, Indianapolis, IN, USA
4. Department of Obstetrics & Gynecology, Northwestern University, Chicago, IL, USA
5. Department of Obstetrics & Gynecology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
6. Department of Obstetrics & Gynecology, Yale University, New Haven, CT, USA