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Toll-like receptor 4 expression in baseline (BL; n = 44) biopsy of patients with irritable bowel syndrome (IBS) is increased as compared to healthy controls (HC; n = 21). The line in the box shows the median expression value, boxes indicate the upper (75th percentile) and lower quartiles (25th percentile) of the data, significant difference between HC and patients with diarrhea-predominant IBS is indicated with asterisk (*P < 0.001).
