1. Cardiovascular and Critical Care Nursing Patient Services, Boston Children’s Hospital, Boston, Massachusetts
2. Department of Psychosocial Oncology and Palliative Care, Dana-Farber Cancer Institute, Boston, Massachusetts
3. Department of Pediatrics, Boston Children’s Hospital, Boston, Massachusetts
4. Department of Cardiology, Boston Children’s Hospital, Boston, Massachusetts
5. Department of Pediatrics, Harvard Medical School, Boston, Massachusetts
6. Department of Critical Care Medicine, Vanderbilt, Nashville, Tennessee
7. Sydney Medical School, University of Sydney, Sydney, Australia