Estrogen promotes osteogenic differentiation of mouse bone marrow mesenchymal stem cells in a dose-dependent manner  
Zhu Xiao-fei1, Wang Yang2, Jin Yan3, Jia Li-hui4
Chinese Journal of Tissue Engineering Research . 2012, (19): 3433 -3437 .  DOI: 10.3969/j.issn.1673-8225.2012.19.003