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Wei, Randy L.; Jung, Brian C.; Manzano, Wilfred; Sehgal, Varun; Klempner, Samuel J.; Lee, Steve P.; Ramsinghani, Nilam S.; Lall, Chandana . (2016). Bone mineral density loss in thoracic and lumbar vertebrae following radiation for abdominal cancers. Radiotherapy and Oncology, 118(3), 430–436. doi:10.1016/j.radonc.2016.03.002 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research