Xie Zhi-Tao, Wang Shen, Zhang Yong-Tao, Tian Zai-Jie, Ma Zhi-Lin, Liu Bo-Yu, and Niu Jing. 2017. “The High Prevalence of Knee Osteoarthritis in North China Population: The Handan Osteoarthritis Study”. International Journal of Innovative Research in Medical Science 2 (09):1276 to 1279. https://doi.org/10.23958/ijirms/vol02-i09/07.