Differential regulation of luteinizing hormone, follicle-stimulating hormone, and free alpha-subunit secretion from the gonadotrope by gonadotropin-releasing hormone (GnRH): evidence from the use of two GnRH antagonists - Hall,J.E.; Whitcomb,R.W.; Rivier,J.E.; Vale,W.W.; Crowley,W.F. (J Clin Endocrinol Metab, 1990)