COL17A1 and urticaria: Also, patients with positive ELISA values (for BP180-NC16A-, BP230-specific IgG autoantibodies or both) showed statistically significant higher values of ABSIS cutaneous score, BPDAI global score, BPDAI score of erosion activity and BPDAI score of urticaria/erythema, compared with patients with negative ELISA findings (Table 1).