1. Center for Health Equity Research and Promotion, Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, Pennsylvania2Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania
2. Center for Health Equity Research and Promotion, Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, Pennsylvania
3. Center for Health Equity Research and Promotion, Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, Pennsylvania3Department of Biostatistics, University of Pittsburgh, Pittsburgh, Pennsylvania
4. Center for Health Equity Research and Promotion, Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, Pennsylvania4Department of General Internal Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
5. Department of General Internal Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania