1. Department of Cardiology Chongqing Institute of Cardiology Daping Hospital Third Military Medical University Chongqing China
2. Department of Cardiology North Sichuan Medical College First Affiliated Hospital Nanchong Sichuan China
3. Cardiovascular Research Center & Department of Physiology Temple University School of Medicine Philadelphia PA
4. Department of Statistics The George Washington University Washington DC
5. Division of Renal Disease & Hypertension The George Washington University School of Medicine & Health Sciences Washington DC