YU B1; HE ZY; YOU P; HAN QW; XIANG D; CHEN F; WANG MJ; LIU CC; LIN XW; BORJIGIN U: 'Reprogramming fibroblasts into bipotential hepatic stem cells by defined factors', CELL STEM CELL, vol. 13, 2013, pages 328 - 340, XP055194339, DOI: doi:10.1016/j.stem.2013.06.017