IL10 and systemic lupus erythematosus: To know whether the serum calcium levels of SLE patients were correlated with their levels of Th1/Th2 cytokines, the IL-2, IL-4, IL-6, IL-10, TNF-α and IFN-γ in sera of SLE patients with normal (Ca2+ N) or low (Ca2+ L) serum calcium levels and healthy people were detected using cytometric bead array (CBA) and the correlation to the serum calcium levels was analyzed.