1. Fetal Cardiac Program, Labatt Family Heart Centre, Department of Pediatrics, The Hospital for Sick Children; University of Toronto; Toronto; Canada
2. Prenatal Diagnosis and Medical Genetics Program, Mount Sinai Hospital; University of Toronto; Toronto; Canada
3. Department of Pathology and Laboratory Medicine, Mount Sinai Hospital; University of Toronto; Toronto; Canada
4. Fetal Medicine Unit, Mount Sinai Hospital; University of Toronto; Toronto; Canada