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Nathan Christensen; Mary D'Souza; Xiaoxia Zhu; Robert D. Frisina. (2009). Age-related hearing loss: Aquaporin 4 gene expression changes in the mouse cochlea and auditory midbrain. , 1253(none), 27–34. doi:10.1016/j.brainres.2008.11.070 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research