1. Department of Pediatric Hematology/Oncology, Vanderbilt University Medical Center and Monroe Carrell Jr. Children's Hospital at Vanderbilt, Nashville, Tennessee, USA.
2. Family Care Community, Vanderbilt University School of Nursing, Nashville, Tennessee, USA.
3. Division of Hospice and Palliative Medicine, Department of Pediatrics, Texas Children's Hospital and Baylor College of Medicine, Houston, Texas, USA.
4. Department of Biostatistics, Vanderbilt University Medical Center, Nashville, Tennessee, USA.
5. Peabody College, Vanderbilt University, Nashville, Tennesse, USA.