Serum bioactive and immunoreactive luteinizing hormone and follicle-stimulating hormone levels in women with cycle abnormalities, with or without polycystic ovarian disease - Fauser,B.C.; Pache,T.D.; Lamberts,S.W.; Hop,W.C.; de Jong,H.F.; Dahl,K.D. (J Clin Endocrinol Metab, 1991)