Analysis of serum cytokine levels using a multisuspension array system. The serum concentration levels of IL-2, IL-4, IL-6, IL-10, IL-12(p70), and IFN-γ were measured in RzCD19Cre mice with B-cell lymphomas (B), T-cell lymphomas (T), and other tumors (mammary tumor, sarcoma, and hepatocellular carcinoma) and in tumor-free RzCD19Cre, Rz, CD19Cr,e and WT mice.