SELL and systemic sclerosis: To this aim, we included binarized serum levels of PSGL-1, ADAM8, and P-, E-, and L-selectins of SLE (n = 27) and SSc patients (n = 28) in a multivariable BLR analysis, together with gender, age, disease duration, and treatment (glucocorticoids and immunosuppressants) as confounder factors.