1. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynaecology; Sunnybrook Health Sciences Centre, University of Toronto; Toronto Canada
2. The Prenatal Diagnosis and Medical Genetics Program, Department of Obstetrics and Gynaecology; Mount Sinai Hospital, University of Toronto; Toronto Canada
3. Division of Clinical and Metabolic Genetics, Department of Pediatrics; The Hospital for Sick Children, University of Toronto; Toronto Canada
4. Department of Medical Genetics; North York General Hospital, University of Toronto; Toronto Canada
5. Division of Molecular Pediatrics, Maternité; Centre Hospitalier Universitaire Vaudois; Lausanne Switzerland
6. Department of Pathology; Mount Sinai Hospital, University of Toronto; Toronto Canada
7. Department of Pathology; North York General Hospital, University of Toronto; Toronto Canada
8. Division of Diagnostic Imaging; Mount Sinai Hospital, University of Toronto; Toronto Canada
9. Department of Medical Imaging; Sunnybrook Health Sciences Centre, University of Toronto; Toronto Canada