CFTR and infection: The variables used for this analysis included patient clinical data (age, pFEV1, time since first infection, infection within the last 3 months prior to the date of collection of each isolate, CFTR class), phenotypic characteristics of the isolate (Abz hydrolysis, bacterial growth, susceptibility to tobramycin and aztreonam, mucoidy and colony morphology) and genotypic data (LasB and LasR variants) (Supplementary Datafile).