COL17A1 and epidermolysis bullosa: Birmingham Epidermolysis Bullosa Severity score (BEBS) correlated with anti-type VII collagen autoantibodies titres (P = 0.0190) (Figure 4A) and also with anti-BP180 and anti-BP230, P = 0.0119 and P = 0.0097, respectively (Figure 4B and 4C).