The 2nd Affiliated Hospital of Harbin Medical University The Second Affiliated Hospital of Harbin Medical University, Department of Geriatrics, No. 246, Xuefu Road, Nangang District, Harbin City, Heilongjiang Province, China https://www.hrbmush.edu.cn 246 Xuefu Road, Nangang District Harbin 150086 China https://www.hrbmush.edu.cn Bronze