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Robert H. Christenson; Hassan M.E. Azzazy. (2009). Cardiac point of care testing: A focused review of current National Academy of Clinical Biochemistry guidelines and measurement platforms. , 42(3), 150–157. doi:10.1016/j.clinbiochem.2008.09.105 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research