1. Department of Pediatrics, Division of Hematology/Oncology Washington University School of Medicine St. Louis Missouri USA
2. Department of Medicine Bioethics Research Center Washington University School of Medicine St. Louis Missouri USA
3. Department of Oncology St. Jude Children's Research Hospital Memphis Tennessee USA
4. Division of Quality of Life and Palliative Care St. Jude Children's Research Hospital Memphis Tennessee USA
5. Pediatric Oncology and Division of Population Sciences, Dana‐Farber Cancer Institute Boston Massachusetts USA
6. Division of Pediatric Hematology/Oncology Boston Children's Hospital Boston Massachusetts USA