1. Division of Cardiology, Department of Pediatrics, Children's Hospital of Pittsburgh of UPMC; University of Pittsburgh Medical School; Pittsburgh Pennsylvania, USA
2. Division of Emergency Medicine, Ann & Robert H. Lurie Children's Hospital of Chicago; Northwestern University Feinberg School of Medicine; Chicago Illinois, USA
3. Division of Academic General Pediatrics, Ann & Robert H. Lurie Children's Hospital of Chicago; Northwestern University Feinberg School of Medicine; Chicago Illinois, USA
4. Divisions of Cardiology and Critical Care Medicine, Ann & Robert H. Lurie Children's Hospital of Chicago; Northwestern University Feinberg School of Medicine; Chicago Illinois, USA