1. Department of Cardiology, Tianjin Medical University General Hospital , Tianjin , China
2. Departments of Epidemiology, Beijing Anzhen Hospital, Capital Medical University, the Key Laboratory of Remodeling-Related Cardiovascular Diseases, Ministry of Education, Beijing Municipal Key Laboratory of Clinical Epidemiology, Beijing Institute of Heart , Lung and Blood Vessel Diseases, Beijing , China
3. Division of Cardiology, University of North Carolina , Chapel Hill, NC
4. Division of Cardiology, David Geffen School of Medicine at University of California , Los Angeles, CA
5. International Quality Improvement Department , American Heart Association, Dallas, TX