FOLH1 and prostate cancer: While a strong relation between uptake of PSMA-ligands and histologic PSMA-expression has already been proven for [68Ga]Ga-PSMA-11 in a dedicated ex vivo animal model [28] and immunohistochemical validation of clinical primary prostate cancer samples [29], such evidence has not been provided for [18F]F-PSMA-1007 to date.