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Szabo, A.; Haj, M.; Waxsman, I.; Eitan, A. . (2000). Evaluation of Seprafilm and Amniotic Membrane as Adhesion Prophylaxis in Mesh Repair of Abdominal Wall Hernia in Rats. European Surgical Research, 32(2), 125–128. doi:10.1159/000008751 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research