CD68 and myalgic encephalomeyelitis/chronic fatigue syndrome: In Dbh+ mice, CD68 increased in response to CFS (q = 5.3; p < 0.01), while levels were elevated in rested Dbh− mice relative to rested Dbh+ mice (q = 7.1; p < 0.001) and did not increase further in response to CFS (q = 0.2, N.S.), as summarized in Figure 6F.