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Li, Jing; Chen, Jun; Li, Xiuyu; Qian, Yanfang . (2017). Vaccination efficacy with marrow mesenchymal stem cell against cancer was enhanced under simulated microgravity. Biochemical and Biophysical Research Communications, 485(3), 606–613. doi:10.1016/j.bbrc.2017.01.136 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research