Berkson David, Queller Hayley, Holmes Nathan, Yun Dug Su, Sandella Bradley, Sargent Thomas
Family, Community, and Preventive Medicine, Drexel University College of Medicine, Philadelphia, PA, USA.
Pediatr Cardiol. 2010 Jul;31(5):689-92. doi: 10.1007/s00246-009-9633-9. Epub 2010 Jan 14.