1. Division of Maternal‐Fetal Medicine, Department of Obstetrics, Gynecology, and Reproductive Sciences University of California San Francisco California USA
2. Division of Medical Genetics, Department of Pediatrics University of California San Francisco California USA
3. Division of Maternal‐Fetal Medicine, Department of Gynecology and Obstetrics The Johns Hopkins University School of Medicine Baltimore Maryland USA
4. Department of Genetic Medicine The Johns Hopkins University School of Medicine Baltimore Maryland USA
5. Division of Maternal‐Fetal Medicine Sidney Kimmel Medical College of Thomas Jefferson University Philadelphia Pennsylvania USA
6. McLendon Clinical Laboratories, Cytogenetics Laboratory University of North Carolina Health Chapel Hill North Carolina USA
7. Division of Maternal‐Fetal Medicine, Department of Obstetrics and Gynecology University of North Carolina at Chapel Hill School of Medicine Chapel Hill North Carolina USA