Ilondo, MM., Vanderschuerenlodeweyckx, M., De Meyts, P., & Eggermont, E. (1990). Serum Growth-hormone Levels Measured By Radioimmunoassay and Radioreceptor Assay - a Useful Diagnostic-tool in Children With Growth Disorders. Journal of Clinical Endocrinology and Metabolism, 70(5), 1445-1451. https://doi.org/10.1210/jcem-70-5-1445 (Original work published 1990)