FOLH1 and Familial prostate cancer: From an evaluation of low-risk prostate cancer patients by Sandgren et al., we found a significantly positive correlation between mean FOLH1 expression and the reported median PSMA radiotracer uptake (Figure 4C (green); p = 0.034, R = 0.61) and a non-significant positive correlation between mean FOLH1 expression and mean PSMA uptake in the study published by Piron et al. (Figure 4C (red); p = 0.15, R = 0.36).