HSD11B1 and obesity due to melanocortin 4 receptor deficiency: Unfortunately, we were not able to perform a meta-analysis with the summary of these data, since the studies varies in their way to express BMI (absolute number, lean vs overweight vs obesity, lean controls vs excessive weight), abdominal compartment HSD11B1 expression (SAT, VAT or SAT + VAT) and different methodologies to quantify this expression (hybridized area/field vs relative curve vs ΔΔct).