5Reker RR, Lappe J, Davies K, et al. Characterization of perimenopausal bone loss: a prospective study [J]. J Bone Miner Res, 2000,15: 1965-1973.
6Nordin BE. Calcium and osteoporosis [J]. Nutritiom, 1997 , 13 : 664-686.
7Dawson-Hughes B,Dallal GE,Krall EA,et al. A comtrolled trial of the effect of calcium supplementation on bone density in postmenopausal women[J]. N Engl J Med,1990,323: 878-884.
8Dawson-Hughes B. Calcium and Vitnmin D nutrition needs of elderly women[J]. J Nutr,1996,126(4 suppl ) : 1165S-1167S.
9Heaney RP, Dowell MS, Hale CA, et al. Calcium absorption varies within the reference range for serum 25 -hydroxyvitamin D [J]. JAm Coll Nutr,2003,22:142-146.
10Bischoff-Ferrari HA, Giovannucci E, Willett WC. Estimation of optimal serum concentrations of 25 -hydroxyvitamin D for multiple health outcome [J]. Am J Clin Nutr ,2006,84: 18-28.
