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Tang, Wenbo; Bentley, Amy R.; Kritchevsky, Stephen B.; Harris, Tamara B.; Newman, Anne B.; Bauer, Douglas C.; Meibohm, Bernd; Cassano, Patricia A. . (2013). Genetic variation in antioxidant enzymes, cigarette smoking, and longitudinal change in lung function. Free Radical Biology and Medicine, 63(), 304–312. doi:10.1016/j.freeradbiomed.2013.05.016 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research