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Chen, Harold. (2017). Atlas of Genetic Diagnosis and Counseling || Lesch-Nyhan Syndrome. , 10.1007/978-1-4939-2401-1(Chapter 147), 1715–1721. doi:10.1007/978-1-4939-2401-1_147 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research