Han, C, C Jiang, C Yu, and H Shen. 2015. “Differentiation of Transforming Growth Factor β1-Induced Mesenchymal Stem Cells into Nucleus Pulposus-Like Cells under Simulated Microgravity Conditions”. Cellular and Molecular Biology 61 (2):50-55. https://www.cellmolbiol.org/index.php/CMB/article/view/650.