TNFSF13B and myasthenia gravis: There are few data about gender differences in BAFF levels in autoimmune diseases other than MG, although Panchanathan and Choubey (2013) reported that levels of the BAFF mRNA were measurably higher in cells isolated from females than male mouse models of lupus diseases and murine BAFF expression was found to be up-regulated by estrogen and interferons.