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Sarah E. Vermeer; Ewoud J. Van Dijk; Peter J. Koudstaal; Matthijs Oudkerk; Albert Hofman; Robert Clarke; Monique M.B. Breteler. (2002). Homocysteine, silent brain infarcts, and white matter lesions: The Rotterdam scan study. , 51(3), 285–289. doi:10.1002/ana.10111 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research