CXCL8 and asthma: Increased IL-17A mRNA and/or IL-8 mRNA levels could discriminate asthma patients from the healthy control group at a cut-off of 5 for IL-17A mRNA (p = 0.0006 by Fisher's exact test) and at a cut-off of 30 for IL-8 mRNA (p = 0.0009 by Fisher's exact test).