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Martins, Margarida; Ribeiro, Diana; Martins, Albino; Reis, Rui Luís; Neves, Nuno Meleiro . (2016). Extracellular Vesicles Derived from Osteogenically Induced Human Bone Marrow Mesenchymal Stem Cells Can Modulate Lineage Commitment. Stem Cell Reports, 6(3), 284–291. doi:10.1016/j.stemcr.2016.01.001 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research