1. Division of Palliative Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA.
2. Division of Medical Oncology, The Ohio State University James Comprehensive Cancer Center, Columbus, Ohio, USA.
3. Center for Biostatistics, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA.
4. Cancer Control and Prevention, The Ohio State University James Comprehensive Cancer Center, Columbus, Ohio, USA.
5. Department of Oncology Nursing, The Ohio State University James Comprehensive Cancer Center, Columbus, Ohio, USA.