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Guo, Yan; Ning, Fei; Wang, Guojian; Li, Xiaohong; Liu, Jisheng; Yuan, Yongyi; Dai, Pu . (2019). Retrospective study of Langerhans cell histiocytosis in ear, nose and neck. American Journal of Otolaryngology, (), 102369–. doi:10.1016/j.amjoto.2019.102369 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research