1. Hypertension Center, National Center for Cardiovascular Diseases, Peking Union Medical College & Chinese Academy of Medical Sciences, Fuwai Hospital , Beilishi Road 167, Xicheng District, Beijing 100037 , China
2. Department of Cardiology, First Hospital of Shanxi Medical University , No. 85 Jiefang South Road, Yingze District, Taiyuan, Shanxi Province 030001 , China
3. Department of Cardiology, Benxi Railway Hospital , No. 25 Yingchun Street, Pingshan District, Benxi, Liaoning Province 117000 , China
4. Institute of Prevention and Treatment of Cardiovascular Diseases in Alpine Environment of Plateau , Characteristic Medical Center of the Chinese People's Armed Police Forces, No. 220 Chenglin Road, Tianjin 300162 , China