TGFβ inhibition enhances the generation of hematopoietic progenitors from human ES cell-derived hemogenic endothelial cells using a stepwise strategy - Chengyan Wang; Xuming Tang; Xiaomeng Sun; Zhenchuan Miao; Yaxin Lv; Yanlei Yang; Huidan Zhang; Pengbo Zhang; Yang Liu; Liying Du; Yang Gao; Ming Yin; et al. (Cell Research, 2012)