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Pham, Phuc Van. (2017). [Stem Cells in Clinical Applications] Neurological Regeneration || Stem Cell Trials for Retinal Disease: An Update. , 10.1007/978-3-319-33720-3(Chapter 10), 173–180. doi:10.1007/978-3-319-33720-3_10 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research