1. Dell Medical School, Department of Women’s Health, University of Texas at Austin, Austin, TX, United States of America
2. Magee-Womens Research Institute, University of Pittsburgh, Pittsburgh, PA, United States of America
3. Department of Biophysics & Biochemistry, University of California, San Francisco, San Francisco, CA, United States of America
4. School of Public Health, Department of Biostatistics, Yale University, New Haven, CT, United States of America
5. School of Medicine, Department of Obstetrics and Gynecology, University of Alabama - Birmingham, Birmingham, AL, United States of America
6. School of Medicine, Intermountain Healthcare, Department of Obstetrics and Gynecology, University of Utah, Salt Lake City, UT, United States of America
7. School of Medicine, Department of Obstetrics and Gynecology, University of Pennsylvania, Philadelphia, PA, United States of America
8. Arnold School of Public Health, Department of Epidemiology and Biostatistics, University of South Carolina, Columbia, SC, United States of America
9. Department of Obstetrics and Gynecology, University of Texas Medical Branch at Galveston, Galveston, TX, United States of America
10. Pregnancy and Perinatology Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, MD, United States of America
11. Signal Biology Inc., Philadelphia, PA, United States of America