1. Department of Internal Medicine, Division of Hematology, Oncology, and Blood & Marrow Transplantation, University of Iowa Health Care, Iowa City, IA 52242, USA
2. Department of Biostatistics, University of Nebraska Medical Center, Omaha, NE 68198,USA
3. College of Nursing - Omaha Division, University of Nebraska Medical Center, Omaha, NE 68198, USA
4. Division of Pediatric Palliative Care, Children's Hospital & Medical Center, Omaha, NE 68114, USA
5. Department of Pediatrics, Division of Pediatric Hematology/Oncology, University of Nebraska Medical Center, Omaha, NE 68198, USA
6. Division of Geriatrics, Gerontology and Palliative Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
7. Department of Internal Medicine, Division of Hematology–Oncology, University of Nebraska Medical Center, Omaha, NE 68198, USA
8. Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE 68198, USA