Nature Reviews Endocrinology 16, 256–257 (2020). Published online 17 March 2020

The image for this Research Highlight was reprinted courtesy of Wenhan Chang/University of California. The image caption incorrectly stated that it shows “the hyperplastic portion of PTGs (blue) from mice with secondary HPT”. The PTGs are in fact from patients with secondary PTG. The corrected text now reads “the hyperplastic portion of PTGs (blue) from patients with secondary HPT”. HPT, hyperparathyroidism; PTG, parathyroid gland.