Patterns of pulsatile luteinizing hormone and follicle-stimulating hormone secretion in prepubertal (midchildhood) boys and girls and patients with idiopathic hypogonadotropic hypogonadism (Kallmann's syndrome): a study using an ultrasensitive time-resolved immunofluorometric assay - Wu,F.C.; Butler,G.E.; Kelnar,C.J.; Stirling,H.F.; Huhtaniemi,I. (J Clin Endocrinol Metab, 1991)