Immunoarray and ELISA assay results from serum samples of cancer patients for (A) IL-6, (B) TNF-α, (C) CRP, and (D) IL-1β. S1–S4 corresponds to patient samples spiked with 50, 100, 200, and 500 pg mL-1 respectively. (*) corresponds to values below the detection limits of ELISA and (#) corresponds to values above the dynamic range of the microfluidic immunoarray.