1. Health Policy, Quality & Informatics Program, Michael E. DeBakey VA Medical Center Health Services Research & Development Center for Innovations, Houston, TX, USA
2. Division of Cardiovascular Medicine and the Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA, USA
3. Department of Medicine, Section of Cardiology, Baylor College of Medicine, Houston, TX, USA
4. Section of Cardiology, Michael E. DeBakey Veterans Affairs Medical Center, Houston, TX, USA
5. Section of Cardiovascular Research, Department of Medicine, Baylor College of Medicine, Houston, TX, USA