CX3CL1 and Atrophy: Subjects with tCD also showed lower CX3CL1 than controls, although some patients showed normal levels, and differences between groups were less significant: p = 0.0003 and p = 0.0004 for superficial and basal epithelium, respectively, vs. controls with Marsh 0: p = 0.025 and p = 0.22 for superficial and basal epithelium, respectively, vs. controls with atrophy.