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Richard F. Loeser; Steven R. Goldring; Carla R. Scanzello; Mary B. Goldring. (2012). Osteoarthritis: A disease of the joint as an organ. , 64(6), 0–0. doi:10.1002/art.34453 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research