In all patients with RDEB, anti-type VII collagen autoantibodies titres significantly correlated with both anti-BP180 (slope < 0.0009, R2 0.53) (Figure 3A) and anti-BP230 (slope < 0.0001, R2 0.83) autoantibodies titres (Figure 3B). Here, COL17A1 is linked to recessive dystrophic epidermolysis bullosa.