1. Division of Hematology/Oncology, Department of Medicine, University of Pittsburgh , Pittsburgh, PA, USA
2. Shenandoah Oncology , Winchester, VA, USA
3. Department of Health Policy and Management, School of Public Health, University of Pittsburgh , Pittsburgh, PA, USA
4. Division of General Internal Medicine, Department of Medicine, University of Pittsburgh , Pittsburgh, PA, USA
5. Department of Biostatistics, School of Public Health, University of Pittsburgh , Pittsburgh, PA, USA
6. Division of Health Services Research, Department of Urology, University of Pittsburgh School of Medicine , Pittsburgh, PA, USA
7. University of Colorado Comprehensive Cancer Center , Aurora, CO, USA
8. Department of Health Systems, Management & Policy, Colorado School of Public Health , Aurora, CO, USA