CCL18 and Alzheimer disease: The plasma/serum concentrations of the other chemokines tested (CCL3, CCL4, CCL5, CCL7, CCL11, CCL17, CCL18, CCL19, CCL22, CCL26; CXCL1, CXCL12; CX3CL1) had no significant differences between AD and HC (average ratios ranging from 0.81 to 1.71, p > 0.05).