Prevalence and factors associated with knee osteoarthritis among middle-aged and elderly individuals in rural Tianjin: a population-based cross-sectional study. - Ji, Shuqing; Liu, Li; Li, Jiwei; Zhao, Guohua; Cai, Yana; Dong, Yanan; Wang, Jinghua; Wu, Shengguang (Journal of Orthopaedic Surgery & Research, 2023)