While the adrenal-specific role of Abcb1b is unknown in mice, ABCB1 has been shown to mediate GC release from human adrenal cells19 and ABCB1 polymorphism (rs2032582) has been associated with higher cortisol secretion in cortisol-producing adrenal adenomas in humans100. Here, ABCB1 is linked to adrenal cortex adenoma.