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Liu, Rongqiang; Liu, Qiuli; He, Ying; Shi, Wenqing; Xu, Qianhui; Yuan, Qing; Lin, Qi; Li, Biao; Ye, Lei; Min, Youlan; Zhu, Peiwen; Shao, Yi . (2019). Association between Helicobacter pylori infection and nonalcoholic fatty liver. Medicine, 98(44), e17781–. doi:10.1097/md.0000000000017781 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research