III. To evaluate the effects of single agent nivolumab, and the combination of ipilimumab and nivolumab on circulating cytokine markers by multiplex assay, such as: interleukin (IL)-2, IL-4, IL-6, IL-10, IL-8, interferon gamma-induced protein 10 (IP10), chemokine (C-X-C motif) ligand 13 (CXCL13), interferon (IFN)-gamma, tumor necrosis factor (TNF)-alpha, soluble IL-2 receptor (sIL2R)-alpha, sCD27, soluble TNF receptor (sTNFR)1, and sTNFR2.