1. Department of Public Health Sciences—Biostatistics, Medical University of South Carolina, Charleston, SC, USA
2. Health Equity and Rural Outreach Innovation Center (HEROIC), Ralph H. Johnson Department of Veterans Affairs Medical Center, Charleston, SC, USA
3. The EMMES Corporation, Rockville, MD, USA
4. Division of Biostatistics, Department of Epidemiology and Biostatistics, University of South Carolina, Columbia, SC, USA