Human umbilical cord stromal stem cells-conditioned medium down-regulated the expression of transforming growth factor beta in rat hepatic stellate cells
Li Ming-liang, Yao Zhi-cheng, Zhong Yue-si, Lin Nan, Xu Rui-yun, Deng Mei-hai
Chinese Journal of Tissue Engineering Research . 2012, (10): 1769 -1772 .  DOI: 10.3969/j.issn.1673-8225.2012.10.014