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Bashir, Umair; El Abiad, Rami; Gerke, Henning; Keech, John; Parekh, Kalpaj; Nau, Peter . (2019). Peroral Endoscopic Myotomy Is Feasible and Safe in a Gastric Bypass Population. Obesity Surgery, (), –. doi:10.1007/s11695-019-04026-9 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research