4Writing group for the women's health initiative investigators.Risks and benefits of estrogen plus progestin in healthy post menopausal women: principal results from the women's Health initiative randomized controlled trial. JAMA, 2002,288: 366-368.
5Morss GM,Jordan AN, Skinner JS, et al. Dose response to exercise in women aged 45-75yr (DREW) : design and rationale. Med Sci Sport Exerc, 2004, 36 336-344.
6Taaffe DR, Robinson TL, Snow CM, et al. High impact exercise promotes bone gain in well-trained female athletes. J Bone Miner Res, 1997, 127 255-260.
7Frost RM. Perspectives on our age-related bone mass: insights from a new paradigm. J Bone Miner Res, 1997, 12:1539-1546.
9Cheryl L,Elizabeth S, Sharon W, et al. Systematic review of the literature on postpartum care: Methodology and literature search results[J]. Birth, 2004, 31(3): 196-202.
10Prema Ramachandran. Maternal &child nutrition: New dimensions of the dual nutrition burden[J]. Indian J. Med. Res, 2009, 110(16): 575-578.