%0 Journal Article %T Grand challenges in the field of stem cell research %A Atsushi Asakura %J Frontiers in Cell and Developmental Biology %D 2014 %I Frontiers Media %R 10.3389/fcell.2014.00002 %K stem cell %K regeneration %K embryonic stem cell %K induced pluripotent stem cell %K satellite cell %K hematopoietic stem cell %K direct reprogramming %K MyoD %U http://www.frontiersin.org/Journal/10.3389/fcell.2014.00002/full