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Kim, Sujin; Kwon, Soonman . (2015). Impact of the policy of expanding benefit coverage for cancer patients on catastrophic health expenditure across different income groups in South Korea. Social Science & Medicine, 138(), 241–247. doi:10.1016/j.socscimed.2015.06.012 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research