1. Department of Pediatric Cardiology, Stanford University School of Medicine and Lucile Packard Children’s Hospital, Palo Alto, CA, USA
2. Department of Psychiatry and Behavioral Sciences, Boston Children’s Hospital and Harvard Medical School, Boston, MA, USA
3. Massachusetts General Physician Organization Ambulatory Management, Massachusetts General Hospital, Boston, MA, USA
4. Department of Cardiology, Boston Children’s Hospital and Harvard Medical School, Boston, MA, USA
5. Department of Pediatrics, Hasbro Children’s Hospital and Brown University, Providence, RI, USA