IL15 and chronic inflammatory demyelinating polyradiculoneuropathy: In all groups, there was no detectable levels of GM-CSF, IFN-α2, IL-1α, IL-3, IL-5, IL-12(p40), IL-15, or leukemia inhibitory factor [60], but patients in the active phase of CIDP have been found to have elevated levels of serum endothelial leukocyte adhesion molecule-1 (ELAM-1) [61].