DUX4 and facioscapulohumeral muscular dystrophy: Modelling myogenic specification/commitment in FSHD using embryonic cells and iPSC reveals a peak of DUX4 occurs during a “myogenic progenitor/satellite cell‐like” phase, characterised by increased PAX7 and PAX3 levels (Caron et al, 2016; Haynes et al, 2017).