Comparative Analysis of Targeted Differentiation of Human Induced Pluripotent Stem Cells (hiPSCs) and Human Embryonic Stem Cells Reveals Variability Associated With Incomplete Transgene Silencing in Retrovirally Derived hiPSC LinesSanna Toivonen, Timo Otonkoski, Anu Hyysalo et al.|Stem Cells Translational Medicine|2013Cited by 71