1. Division of General Internal Medicine; VA North Texas Health Care System; Dallas Texas
2. Division of General Internal Medicine; University of Texas Southwestern Medical Center; Dallas Texas
3. VA Center for Health Equity Research and Promotion and VA Pittsburgh Healthcare System; and Division of General Internal Medicine; University of Pittsburgh; Pittsburgh Pennsylvania
4. Division of Pulmonary Disease & Critical Care Medicine; South Texas Veterans Health Care System and University of Texas Health Science Center at San Antonio; San Antonio Texas