CXCL1 and susceptibility to pneumonia measurement: PICFLU - The adjusted BS4 module containing EGF, Eotaxin, FGF-2, Fractalkine (FKN), GRO, IFN-α2, IL-12-P70, IL-7, MDC, and sCD40-L was negatively associated with shock, pneumonia-ARDS and ECMO or death (odds ratio 0.463, 0.598, 0.494, FWER-p = 0.0002, 0.0155, 0.0283, respectively; Table S6).