Li, L.; Yao, X. L.; He, X. L.; Liu, X. J.; Wu, W. C.; Kuang, W.; Tang, M. Role of Mechanical Strain and Estrogen in Modulating Osteogenic Differentiation of Mesenchymal Stem Cells (MSCs) from Normal and Ovariectomized Rats. Cell Mol Biol (Noisy-le-grand) 2013, 59, 1889-93.