1. Clinical Epidemiology and Outcomes Program, Houston VA Health Services Research and Development Center of Excellence, Center for Innovations in Quality, Effectiveness, and Safety (IQuESt); Michael E. DeBakey Veterans Affairs Medical Center; Houston TX
2. Section of Gastroenterology and Hepatology, Department of Medicine; Baylor College of Medicine and Michael E. DeBakey Veterans Affairs Medical Center; Houston TX
3. Section of Health Services Research, Department of Medicine; Baylor College of Medicine; Houston TX