GHRL and diabetes mellitus: Ghrelin correlated positively with cholesterol (r 0.29; p = 0.004) and diabetes mellitus (r =0.17; p =0.03), and negatively with obestatin (r = -0.59; p <0.0001), leptin (r = -0.75; p <0.0001; Figure 1), heart failure (r = -0.25; p = 0.001), presence of metastasis (r = -0.35; p <0.0001) and serum protein levels (r = -0.33; p =0.0001).