Age-associated decline in human femoral neck cortical and trabecular content of insulin-like growth factor I: potential implications for age-related (type II) osteoporotic fracture occurrence. - Boonen,S.; Aersness,J.; Dequeker,J.; Nicholson,P.; Cheng,X.; Lowet,G.; Verbeke,G.; Bouillon,R. (Calcif Tissue Int, 1997)