Natural underlying mtDNA heteroplasmy as a potential source of intra-person hiPSC variability. - Perales-Clemente E; Cook AN; Evans JM; Roellinger S; Secreto F; Emmanuele V; Oglesbee D; Mootha VK; Hirano M; Schon EA; Terzic A; Nelson TJ (The EMBO journal, 2016)