FTO and obesity due to melanocortin 4 receptor deficiency: After mapping the associated variants with expression‐regulatory elements in DNA, we found that BD‐associated variants are in high linkage disequilibrium with an enhancer located in intron 1 of RPGRIP1L; while obesity‐associated variants are in high linkage disequilibrium with an enhancer located in intron 1 of FTO, suggesting a possible differential role of FTO variants in BD and obesity.