1. Department of Biostatistics; Yale University School of Public Health; New Haven Connecticut United States of America
2. Pathonomics LLC; Philadelphia Pennsylvania United States of America
3. Department of Obstetrics and Gynecology; University of Texas Medical Branch; Galveston Texas United States of America
4. Department of Obstetrics and Gynecology; University of Pennsylvania School of Medicine; Philadelphia Pennsylvania United States of America
5. Department of Obstetrics and Gynecology; University of Alabama at Birmingham; Birmingham Alabama United States of America
6. Department of Obstetrics and Gynecology; University of Utah School of Medicine; Salt Lake City Utah United States of America
7. Intermountain Healthcare; Salt Lake City Utah United States of America
8. Magee-Womens Research Institute; University of Pittsburgh School of Medicine; Pittsburgh Pennsylvania United States of America
9. Pregnancy and Perinatology Branch; Eunice Kennedy Shriver; National Institute of Child Health and Human Development; Bethesda Maryland United States of America