LGALS9 and immunoglobulin G4-related sclerosing disease: Although circulating Gal-9 or sTIM-3 were not correlated with the serum IgG4 levels or the ratio of IgG4/IgG, our results indicated that the serum levels of Gal-9 and sTIM-3 are significantly elevated in patients with IgG4-RD as compared to those in HCs.