CD34 and Friedreich ataxia: To study the repopulating ability of CD34+ cells edited with the PGK‐EGFP donor, 3–5 × 105 CD34+ cells treated as in experiments of Fig 3 were transplanted into NSG (black squares) and also into NSG‐SGM3 mice (black circles), that facilitate a preferential reconstitution with myeloid cells (Billerbeck et al, 2011; Miller et al, 2013), which are markedly affected in most FA patients.