Serum samples are used for multiplex analyses. Biomarkers to be assessed include cytokines, chemokines, growth factors, angiogenic and antiangiogenic molecules, matrix metalloproteases (MMPs), tissue inhibitors of MMPs (TIMPs), melanoma-associated antigens, basic fibroblast growth factor, insulin-like growth factor I and II, thrombospondin, endostatin, angiostatin, vasostatin, and vascular endothelial growth factor inhibitor.