1. Division of Critical Care, Department of Pediatrics, University of Utah, Salt Lake City, Utah, USA.
2. Division of Pediatric Palliative Care, Department of Pediatrics, University of Utah, Salt Lake City, Utah, USA.
3. Pediatric Critical Care Services, Primary Children's Hospital, Intermountain Healthcare, Salt Lake City, Utah, USA.
4. College of Nursing, University of Utah, Salt Lake City, Utah, USA.
5. Division of Medical Critical Care, Department of Pediatrics, Boston Children's Hospital, Boston, Massachusetts, USA.
6. Division of Pediatric Palliative Care, Dana-Farber Cancer Institute, Boston, Massachusetts, USA.
7. Division of Hematology/Oncology, Boston Children's Hospital, Boston, Massachusetts, USA.
8. Department of Pediatrics, Harvard Medical School, Boston, Massachusetts, USA.