The NFPA Group had a median prolactin level of 58 ng/mL (range, 32.5-151.2ng/mL) at baseline, which was significantly lower than that observed in the Prolactinoma Group (733.7ng/mL [range, 180-6941ng/mL]) (p<0.001). The gene discussed is PRL; the disease is non-functioning pituitary adenoma.