GLP1R and multiple endocrine neoplasia type 1: The results indicate that 68Ga-DOTA-exendin-4 PET/CT is indeed able to localized insulinomas in MEN-1 patients with high accuracy, i.e. in the context of MEN-1 insulinomas overexpress GLP-1R as in patients with sporadic insulinomas (Antwi et al. 2019c).