1. Medical Genetics Residency Training Program, University of Toronto, Toronto, Ontario, Canada
2. Division of Clinical and Metabolic Genetics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
3. Fetal Medicine Unit, Department of Obstetrics and Gynecology, Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada
4. Department of Pathology and Laboratory Medicine, Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada
5. Department of Laboratory Medicine and Genetics, Trillium Health Partners, Mississauga, Ontario, Canada
6. Intractable Disease Center, Saitama Medical University Hospital, Saitama, Japan
7. The Prenatal Diagnosis and Medical Genetics Program, Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada