LDLR and obesity due to melanocortin 4 receptor deficiency: Bone marrow transplant from miR‐33‐deficient animals into LDLR knockout mice did not result in the obesity or metabolic dysfunction observed in miR‐33/LDLR double knockout animals, suggesting that macrophages and other hematopoietic cells were not responsible for driving this phenotype (Price et al,2017).