In the patients without post-ERCP pancreatitis, a positive correlationwas found between IL-4 and TNFα levels at 24 hours after ERCP (r = 0.397; P = .018),but there was a negative correlation between IL-4 and IL-6 levels at 12 hoursafter ERCP (r = 0.392; P = .018). The gene discussed is IL4; the disease is pancreatitis.