CD40 and pancreatitis: The expression of CD40 was significantly decreased in PDAC (n = 48, **** p < 0.0001) and pancreatitis (n = 21, *** p < 0.0002) patients in comparison to clinical control individuals (n = 51); however, no difference in the expression of CD40 was observed between pancreatitis and PDAC patients (Figure 2A).