| Institution: | 1. Department of Obstetrics, Leiden University Medical Center, Leiden, the Netherlands;2. Department of Obstetrics and Gynaecology, Norwegian Institute of Public Health, Sahlgrenska University Hospital/Östra, Oslo, Norway;3. Department of Clinical Genetics, Leiden University Medical Center, Leiden, the Netherlands;4. Ariosa Diagnostics, San Jose, USA;5. Karolinska Institute, Center of Fetal Medicine, Department of Obstetrics and Gynaecology, Karolinska University Hospital, Stockholm, Sweden |
