Affiliation: | 1. Faculty of Medicine, University of Calgary, Calgary, Alberta, Canada;2. the Department of Obstetrics, Foothills Provincial Hospital Calgary, Alberta, Canada.;3. the Department of Radiology, Foothills Provincial Hospital Calgary, Alberta, Canada.;4. the Department of Pathology, Foothills Provincial Hospital Calgary, Alberta, Canada.;5. the Department of Pediatric Cardiology, Foothills Provincial Hospital Calgary, Alberta, Canada. |