Depressive Symptoms Prevalence and Influencing Factors among Urban and Rural Elderly Patients with Chronic Diseases 
CHANG Yunqi,ZHENG Xiao,LI Mimi,XUE Yaqing,HOU Lihong,ZHENG Jianzhong,ZHANG Chichen
Chinese General Practice . 2021, (10): 1254 -1259 .  DOI: 10.12114/j.issn.1007-9572.2021.00.129