Graphic representation of enzyme-linked immunoassay (ELISA) values obtained using the 3 different Col7 ELISA. Sera of patients with epidermolysis bullosa acquisita (EBA, n = 101) and other autoimmune blistering diseases, including bullous pemphigoid (BP, n = 99), pemphigus vulgaris (PV, n = 40), anti-laminin 332 mucous membrane pemphigoid (anti-lam332 MMP, n = 6), and anti-p200 pemphigoid (n = 65) were analysed. Coloured dots represent RE/ml (NC1 ELISA), U/ml (NC1/NC2 ELISA) or the optical density (OD) at 450 nm (full-length (FL)-Col7 ELISA). Dotted lines indicate cut-off values.