1. Department of Obstetrics and GynecologyUniversity of Utah School of Medicine Salt Lake City UT USA
2. Division of Maternal Fetal MedicineIntermountain Medical Center Salt Lake City UT USA
3. Department of PathologyUniversity of Utah School of Medicine Salt Lake City UT USA
4. ARUP Institute for Clinical and Experimental Pathology®University of Utah School of Medicine Salt Lake City UT USA
5. Epidemiology BranchEunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health Bethesda MD USA