Circulating cytokines also correlated among them at baseline in patients with HF, specifically, IL-6 correlated with IL-8 (r: 0.66), MCP-1 (r: 0.40) and IP-10 (r: 0.36), while IL-8 positively correlated with MCP-1 (r: 0.46). This evidence concerns the gene CXCL8 and hydrops fetalis.