CCKBR and medullary thyroid gland carcinoma: Another randomized cross-over study utilizing 177Lu-PP-F11N, a CCK2 receptor analog with or without sacubitril for treatment of metastatic MTC (NCT03647657) has been completed, and the results are awaited, while another combined pilot and phase I clinical trial (NCT02088645) is currently recruiting advanced MTC patients for theranostics with 177Lu-PP-F11N.