Goodman-Gruen, D. and Barrett-Connor, E., 1997. Epidemiology of insulin-like growth factor-I in elderly men and women. The Rancho Bernardo Study. American Journal of Epidemiology, 145, 970–976; Kaklamani, V.G., Linos, A., Kaklamani E., Markaki, I. and Mantzoros, C., 1999. Age, sex, and smoking are predictors of circulating insulin-like growth factor 1 and insulin-like growth factor-binding protein 3. Journal of Clinical Oncology, 17. 813–817.
