1. Department of Cardiology The First Affiliated Hospital of Xiamen University, School of Medicin, Xiamen University Xiamen China
2. Department of Cardiology the Third Clinical Medical College, Fujian Medical University Fuzhou China
3. University of Alberta John W. Scott Health Sciences Library Edmonton Canada
4. Public Health Agency of Canada Ottawa Ontario Canada
5. University of Alberta, Faculty of Medicine and Dentistry Department of Family Medicine Edmonton Canada