Serum total IGF-I, free IGF-I, and IGFBP-1 levels in an elderly population: Relation to the cardiovascular risk factors and disease. - Janssen,J.A.; Stolk,R.P.; Pols,H.A.; Grobbee,D.E.; Lamberts,S.W. (Arterioscl Trom Vas Biol, 1998)