CD4 and systemic lupus erythematosus: Autoimmune attacks may engage, as dominant effectors, CD8+ T cells (e.g. T1D, vitiligo, AA (6, 92, 93)), CD4+ T cells (e.g. MS, SLE, RA, IBD, EAE, autoimmune thyroid diseases, psoriasis (94)), NK cells (e.g. AA, SLE, RA, MS, psoriasis, T1D (95, 96)) or autoantibodies (e.g. SLE, T1D, psoriasis, Grave’s disease, IBD, MS (97)).