1. Hypertension Center, FuWai Hospital, State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing (Y.D., J.C.).
2. Department of Cardiology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Science (W.L.).
3. Department of Cardiology, Beijing ChaoYang Hospital, Capital Medical University, China (Xinchun Yang).
4. FuWai Yunnan Cardiovascular Hospital, Kunming, China (Z.G.).
5. Department of Cardiology, The First Hospital of Shanxi Medical University, Taiyuan, China (J.Z.).
6. Department of Cardiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, China (R.H.).
7. Department of Cardiology, The Second Affiliated Hospital of Baotou Medical College, Inner Mongolia, China (Xiaomin Yang).
8. Department of Cardiology, The Sixth Hospital of Nanchang, Jiangxi, China (C.Y.).
9. Department of Cardiology, Lanzhou University Second Hospital, Gansu, China (J.Y.).