IL6 and susceptibility to pneumonia measurement: Under a random-effects model, the analyses of the full data set failed to reveal any significant association of the IL-6 -174C allele (OR = 1.00; 95% CI: 0.93–1.08), the IL-10 -592C allele (OR = 1.20; 95% CI: 0.95–1.52), or the IL-10 -1082A allele (OR = 1.43; 95% CI: 0.76–2.70) with risk of pneumonia.