1. The Pediatric Palliative and Comfort Care Team, Division of Pain, Department of Anesthesiology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio.
2. Cancer and Blood Disease Institute, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio.
3. Department of Clinical Sciences, University of Texas at Southwestern Medical Center, Dallas, Texas.
4. The Pauline Allen Gill Center for Cancer and Blood Disorders, Department of Pediatrics, University of Texas at Southwestern Medical Center, Dallas, Texas.
5. Children's Medical Center Dallas, Dallas, Texas.
6. Harold C. Simmons Cancer Center, University of Texas at Southwestern Medical Center, Dallas, Texas.