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Bass, Anne Ruth; Rodriguez, Tomás; Hyun, Gina; Santiago, Francisco Gerardo; Kim, Jacqueline Ilji; Woller, Scott Christopher; Gage, Brian Foster . (2015). Myocardial ischaemia after hip and knee arthroplasty: incidence and risk factors. International Orthopaedics, 39(10), 2011–2016. doi:10.1007/s00264-015-2853-0 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research