Definitive Endodermal Cells Supply an in vitro Source of Mesenchymal Stem/Stromal Cells oleh Yumeng Zhang, Ye Yi, Xia Xiao, Lingling Hu, Jiaqi Xu, Dejin Zheng, Ho Cheng Koc, Un In Chan, Ya Meng, Ligong Lu, Weiwei Liu, Xiaoling Xu, Ningyi Shao, Edwin Chong Wing Cheung, Ren-He Xu, Guokai Chen