1. Cardiovascular Research Center of Chongqing College, Department of Cardiology of Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing 400714, P.R. China
2. Chongqing Key Laboratory for Hypertension Research, Chongqing Cardiovascular Clinical Research Center, Chongqing Institute of Cardiology, Chongqing 400042, P. R. China
3. Division of Renal Diseases & Hypertension, The George Washington University School of Medicine and Health Sciences, Washington, DC 20052, USA
4. Department of Clinical Nutrition, The Third Affiliated Hospital of Chongqing Medical University, Chongqing 401120, P.R. China
5. Department of Cardiology, Daping Hospital, Third Military Medical University, Chongqing 400042, P.R. China