1)Tang BMP, et al:Use of calcium or calcium in combination with vitamin D supplementation to prevent fractures and bone loss in people aged 50 years and older;A meta-analysis. Lancet 370:657-666, 2007
2)Bischoff-Ferrari HA, et al:Effect of vitamin D on falls;A meta-analysis. JAMA 291:1999-2006, 2004
3)Papadimitropoulos E, et al:Meta-analysis of the efficacy of vitamin D treatment in preventing osteoporosis in postmenoposal women. Endocr Rev 23:560-569, 2002
4)Cockayne S, et al:Vitamin K and the prevention of fractures;Systemic review and meta-analysis of randomized controlled trials. Arch Intern Med 166:1256-1261, 2006