Xie Zhi-Tao, Wang Shen, Z. Y.-T. T. Z.-J. M. Z.-L. L. B.-Y. and Jing, N. (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), p. 1276 to 1279. doi: 10.23958/ijirms/vol02-i09/07.