CXCL10 and asthma: RV RNA was positively correlated with CXCL10 mRNA in both groups (no asthma r = 0.61, p < 0.0001; asthma r = 0.57, p < 0.0001), but the slope was significantly greater in the no asthma group (interaction term p = 0.0008; Figure 4D).