Affiliations

• ¹ Antenatal Testing Center Alexandria Hospital, Alexandria, VA, USA.
• ² Department of Obstetrics and Gynecology, Georgetown University Hospital, Washington, D.C., USA.
• ³ Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA.
• ⁴ Departments of Pathology and Cell Biology, Columbia University, New York, NY, USA.
• ⁵ Department of Obstetrics and Gynaecology, Mount Sinai Hospital and University of Toronto, Toronto, Canada.
• ⁶ Departments of Obstetrics and Gynaecology, University Hospitals Leuven, Leuven, Belgium.
• ⁷ North East Thames Regional Genetics Service, Great Ormond Street NHS Foundation Trust, London, UK.
• ⁸ Genetics and Genomic Medicine, UCL Great Ormond Street Institute of Child Health, London, UK.