As expected, IL-15 and CX3CL1 levels measured at day +1 were correlated with each other (r = 0.653, P = 0.00007) and with variables known to be associated with inflammatory status and/or tumor burden, namely low platelet count (PLT) and high levels of fibrinogen (FBG), lactate dehydrogenase (LDH), ferritin (FER), C-reactive protein (CRP), cell-free DNA (cfDNA), growth differentiation factor 15 (GDF15), CXCL9, and neurofilaments (NFL), measured both at pre-lymphodepletion and at day +1 (Figure 2, C and D). This evidence concerns the gene GDF15 and neoplasm.