OLFM4 and obesity due to melanocortin 4 receptor deficiency: Furthermore, our results include four other genes for childhood obesity (identified by GWAS) that were differentially methylated according to age: SDCCAG8 and TNKS/MSRA [90] were first identified in Northern European populations for early-onset extreme obesity whereas OLFM4 and HOXB5 are two recently discovered candidate genes for common childhood obesity that were found by combining 14 existing GWAS datasets [91].