1. Obstetrics and Gynecology, University of North Carolina–Chapel Hill, Chapel Hill, NC, USA
2. Obstetrics and Gynecology, Carilion Clinic, Virginia Tech Carilion School of Medicine, Roanoke, VA, USA
3. Obstetrics and Gynecology, Greenville Health System, Greenville, SC, USA
4. Obstetrics, Gynecology and Reproductive Biology of Michigan State University, Grand Rapids, MI, USA
5. Department of Women’s Health, Spectrum Health System, Grand Rapids, MI, USA
6. Departamento de Ginecologia e Obstetricia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
7. Institute for Maternal and Child Research, University of Chile, Santiago, Chile
8. Pathology Associates, Greenville Health System, Greenville, SC, USA