Levels of IL-6 and MCP-1 in the supernatants of 24 hours, in vitro endotoxin (1 μg/ml LPS)- stimulated purified monocytes from cancer patients with low (T- + N-stage < 3) (limited) versus high (T- + N-stage > 3) (extended) tumour burden. Cultures were either supplied with 20% autologous serum (AS) or serum free medium (SFM). The bars represent means ± SEM of supernatant levels. (LPS-stimulated – baseline levels: IL-6 SFM/AS & MCP-1 SFM. Baseline – LPS-stimulated: MCP-1 AS).