1. Department of Medical Imaging; South Shore Regional Hospital; Bridgewater Nova Scotia Canada
2. Department of Obstetrics and Gynecology; University of Calgary; Calgary Alberta Canada
3. The Prenatal Diagnosis and Medical Genetics Program; Department of Obstetrics and Gynecology, Mount Sinai Hospital
4. Department of Paediatrics; Division of Medical and Metabolic Genetics
5. Department of Laboratory Medicine and Pathobiology; Perinatal Pathology, Mount Sinai Hospital
6. Department of Diagnostic Imaging; Mount Sinai Hospital
7. Institute of Health Policy; Management & Evaluation
8. Department of Medical Imaging, Sunnybrook Health Sciences Centre; University of Toronto; Toronto Ontario Canada