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; Stony Brook University Medical Center; Stony Brook New York
4. Department of Nursing Research and Quality Outcomes, Children's National Health System; The George Washington University; Washington DC