IL22 and acute respiratory distress syndrome: Interestingly, as opposed to the 6 h time point, IL-22 mRNA remained undetectable in the later regeneration phase of APAP-induced ALI, irrespective of the sexes (at 24 h, too low to be validly detectable (n = 5 for males and females), data not shown; at 48 h, see reference [32]).