3Kazuhirok,Mashida T,Kouichi K,et al.Comparison of markers for bone formation and resorption in premenopausal and postmenopausal subjects,and osteoporosis patients.J Clin Endocrinol Metab,1995,80:2447.
4Prestwood KM,Thompson DL,Kenny AM,et al.Low dose estrogen and calcium have an additive effect on bone resorption in older women.J Clin Endocrinol Metab,1999,84:179.