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Kumar, D.; Beavers, D.; DeVita, P.; Messier, S.P. . (2017). Effects of weight-loss on patellofemoral loading in overweight and obese adults with patellofemoral osteoarthritis: secondary analysis from the idea randomized trial. Osteoarthritis and Cartilage, 25(), S171–S172. doi:10.1016/j.joca.2017.02.296 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research