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Guha, A.; Musil, Z.; Vicha, A.; Zelinka, T.; Pacak, K.; Astl, J.; Chovanec, M. . (2019). A systematic review on the genetic analysis of paragangliomas: primarily focused on head and neck paragangliomas. Neoplasma, (), –. doi:10.4149/neo_2018_181208N933 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research