ESRRA and facioscapulohumeral muscular dystrophy: Consistent with our findings in the 54-12 and 54-6 cell lines, PGC1α was suppressed in both combined FSHD myoblasts (P = 0.0033, Fig. 3F) and myotubes (P = 6.8×10-6, Fig. 3F) relative to combined controls, whilst ERRα was only suppressed in combined FSHD myotubes (P = 0.00031, Fig. 3G).