NFKBIZ and respiratory failure: Two polymorphic variants in IL-R1 (rs3917267) and IL-10 (rs3024509) genes were associated with respiratory failure (p = 0.001, & p = 0.003, respectively) whereas several associations with haplotype combinations in NFKBIA (p = 0.02), NFKBIZ (p = 0.01), IL-R1 (p = 0.001) and IL-10 (p = 0.003) genes were also observed.