GRPR and neoplasm: The biodistribution data of 68Ga-labeled GRPR-targeted tracers in PC-3 tumor-bearing mice obtained at 1 h post-injection are provided in Additional file 1: Table S5, and the previously reported data obtained from [68Ga]Ga-TacBOMB2, [68Ga]Ga-RM2 and [68Ga]Ga-AMBA are included for comparison (Wang et al. 2022, 2023).