In IgG4-related Sclerosing Cholangitis and type 1 Autoimmune Pancreatitis (IgG4-SC/AIP) and Chronic Periaortitis (CP) patients, a dominant infiltration of GATA3+ Th2 cells were observed in the affected tissues (19, 20). Here, GATA3 is linked to autoimmune pancreatitis.