CCL4 and delirium: Delirium: PRE: MIP-1α, MIP-1β, IL-6 higher in POD increased and IL-4, IL-5, IL-6, IL-12, IFN-α2, IFN-γ lower in POCD; PRE–POST change: IFN-α2, IFN-γ, IL-4, IL-5, IL-12 lower in POD and IFN-α2, IL-12, and IL-4 lower in POCD