Free and total insulin-like growth factor I (IGF-I), IGF-binding protein-1 (IGFBP-1), and IGFBP-3 and their relationships to the presence of diabetic retinopathy and glomerular hyperfiltration in insulin-dependent diabetes mellitus. - Janssen,J.A.; Jacobs,M.L.; Derkx,F.H.; Weber,R.F.; van der Lely,A.J.; Lamberts,S.W. (J Clin Endocrinol Metab, 1997)