INS and obesity due to melanocortin 4 receptor deficiency: Description of the anthropometric and metabolic parameters (adipokine concentration, concentration of liver enzymes, insulin and lipid metabolism), as well as of the distribution of pre-pubertal children with obesity and with steatosis hepatis in the whole cohort (n=97), as well as separated for males (n=76; 78.4% of cohort) and females (n=21; 21.6% of cohort).