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Rafael Calvo; Ma José Martínez-Zapata; Gerard Urrútia; Ignasi Gich; Marcos Jordán; Alejandro Del Arco; Francisco Javier Aguilera; Fernando Celaya; Juan Sarasquete; Joan Majó; Xavier Bonfill. (2012). Low- vs. high-pressure suction drainage after total knee arthroplasty: a double-blind randomized controlled trial. , 68(4), 758–766. doi:10.1111/j.1365-2648.2011.05760.x 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research