1. Medical Service, GV (Sonny) Montgomery VA Medical Center, Jackson, Mississippi;
2. Division of Geriatrics, Department of Medicine, University of Mississippi, Jackson, Mississippi;
3. Division of Epidemiology and Biostatistics, School of Public Health, University of Illinois at Chicago, Chicago, Illinois;
4. Section of Health Promotion Research, University of Illinois at Chicago, Chicago, Illinois;
5. Center for Management of Complex Chronic Care, Jesse Brown VA Medical Center, Chicago, Illinois;
6. Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Mississippi, Jackson, Mississippi.