Prediction of the individual follicle-stimulating hormone threshold for gonadotropin induction of ovulation in normogonadotropic anovulatory infertility: an approach to increase safety and efficiency - Imani,B.; Eijkemans,M.J.; Faessen,G.H.; Bouchard,P.; Giudice,L.C.; Fauser,B.C. (Fertil Steril, 2002)