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Jerome R Hoffman; David L Schriger; John S Luo. (1991). The empiric use of naloxone in patients with altered mental status: A reappraisal. , 20(3), 246–252. doi:10.1016/s0196-0644(05)80933-3 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research