Comparatively, mean prolactin concentration in the Bromocriptine group was significantly reduced from 885 mIU/l (±178) to 473 mIU/l (±266) (p < 0.001) demonstrating that both treatments were effective treatment for women with hyperprolactinaemia (normal reference range 25-628 mIU/l). The gene discussed is PRL; the disease is Increased circulating prolactin concentration.