1. Division of Quality of Life and Palliative Care, Department of Oncology, St Jude Children’s Research Hospital, Memphis, Tennessee
2. Division of Nursing Research, Department of Pediatric Medicine, St Jude Children’s Research Hospital, Memphis, Tennessee
3. Department of Biostatistics, St Jude Children’s Research Hospital, Memphis, Tennessee
4. Department of Oncology, Division of Pediatric Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins Medicine, Baltimore, Maryland
5. Department of Bioethics, National Institute of Health, Bethesda, Maryland