Median fluorescence intensity (MFI) of CCL4 (A) and CD163 (B) in patients with active lymphocytic colitis (LC) and LC in histological remission (LC-HR), active collagenous colitis (CC) and CC in histological remission (CC-HR), active ulcerative colitis (UC) and UC in remission (UC rem), non-diarrhea controls, and diarrhea controls. Each point represents one patient, and the horizontal line marks the median of each group. Outliers found using the Dixon-Reed method are encircled. *P ≤ .05, **P ≤ .01, ***P ≤ .001, ****P ≤ .0001.