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Sands, Bruce E.; Sandborn, William J.; Panaccione, Remo; O’Brien, Christopher D.; Zhang, Hongyan; Johanns, Jewel; Adedokun, Omoniyi J.; Li, Katherine; Peyrin-Biroulet, Laurent; Van Assche, Gert; Danese, Silvio; Targan, Stephan; Abreu, Maria T.; Hisamatsu, Tadakazu; Szapary, Philippe; Marano, Colleen . (2019). Ustekinumab as Induction and Maintenance Therapy for Ulcerative Colitis. New England Journal of Medicine, 381(13), 1201–1214. doi:10.1056/nejmoa1900750 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research