1. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, University of Utah, Salt Lake City, UT, USA
2. Division of Epidemiology, Department of Internal Medicine, University of Utah, Salt Lake City, UT, USA
3. Division of Medical Genetics, Department of Pediatrics, University of Utah, Salt Lake City, UT, USA
4. Division of Pediatric Cardiology, Department of Pediatrics, University of Utah, Salt Lake City, UT, USA
5. Department of Economics, University of Utah, Salt Lake City, UT, USA