Hearing Loss is an Early Warning of 3-year Incidence of Cognitive Impairment in Older People 
MA Yajun1,LIU Hui,HU Zhihao,LI Xiaodong,WANG Xiaofeng,JIANG Xiaoyan,LI Shujuan
Chinese General Practice . 2020, (11): 1349 -1354 .  DOI: 10.12114/j.issn.1007-9572.2019.00.667