ADAM8 and systemic lupus erythematosus: Following the variable binarization process described in “Materials and methods”, we included categorized serum levels of PSGL-1, ADAM8, and P-, E-, and L-selectins of HD (n = 50) and SLE patients (n = 46) in a multivariable BLR analysis, adjusting by gender and age, with binary outcome for HD or SLE.