Effects of Anxiety on Blood Pressure Variability,Endothelin-1 and Nitric Oxide in Elderly Patients with Hypertension 
WANG Shujuan,CUI Jianguo,QI Jie,YANG Yang,YANG Qianqian,ZHANG Qingtan
Chinese General Practice . 2019, (34): 4277 -4282 .  DOI: 10.12114/j.issn.1007-9572.2019.00.406