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Bouquillard, E; Combe, B . (2009). Rheumatoid arthritis after Chikungunya fever: a prospective follow-up study of 21 cases. Annals of the Rheumatic Diseases, 68(9), 1505–1506. doi:10.1136/ard.2008.097626 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research