MIF and type 1 diabetes mellitus: Since recent literature reported that MIF 5-CATT allele also correlates with lower FEV1 under stable conditions and higher prevalence of P. aeruginosa colonization [14], [20], we applied multiple linear regression to analyse age-normalized FEV1 [17] under stable conditions, including MIF-CATT 5-5 genotype, patients' origin, chronic colonization by P. aeruginosa and presence of insulin-dependent diabetes as covariates.