REFERENCES
- Haugeberg G, Uhlig T, Falch JA, Halse JI, Kvien TK. Bone mineral density and frequency of osteoporosis in female patients with rheumatoid arthritis: results from 394 patients in the Oslo County Rheumatoid Arthritis register. Arthritis Rheum. 2000;43: 522–30.
- Van Staa TP, Geusens P, Bijlsma JW, Leufkens HG, Cooper C. Clinical assessment of the long-term risk of fracture in patients with rheumatoid arthritis. Arthritis Rheum. 2006;54:3104–12.
- No authors listed. Osteoporosis prevention, diagnosis, and ther-apy. NIH Consens Statement. 2000;17:1–45.
- Sorensen OH, Crawford GM, Mulder H, Hosking DJ, Gennari C, Mellstrom D, et al. Long-term efficacy of risedronate: a 5-year placebo-controlled clinical experience. Bone. 2003;32:120–6.
- Bone HG, Hosking D, Devogelaer JP, Tucci JR, Emkey RD, Tonino RP, et al. Ten year's experience with alendronate for osteoporosis in postmenopausal women. N Engl J Med. 2004;350:1189–99.
- Feskanich D, Weber P, Willet WC, Rockett H, Booth SL, Colditz GA. Vitamin K intake and hip fractures in women: a prospective study. Am J Clin Nutr. 1999;69:74–9.
- Genant HK, Wu CY, van Kuijk C, Nevitt MC. Vertebral fracture assessment using a semiquantitative technique. J Bone Miner Res. 1993;8:1137–48.
- Yilmaz L, Ozoran K, Giindfiz OH, Up() H, Yficel M. Alendro-nate in rheumatoid arthritis patients treated with methotrexate and glucocorticoids. Rheumatol Int. 2001;20:65–9.
- Eastell R, Devogelaer JP, Peel NF, Chines AA, Box DE, Sacco-Gibson N, et al. Prevention of loss with risedronate in gluco-corticoid-treated rheumatoid arthritis patients. Osteoporos Int. 2000;11:331–7.
- Kai M, Makino S, Yuasa M, Nishijima T. Study of bone vitamin K deficiency of RA patients-Evaluation with the measurement of uc0C in serum. Rheumatology.2009;42:133-8 (in Japanese).
- Hirao M, Hashimoto J, Ando W, Ono T, Yoshikawa H. Response of serum carboxylated and undercarboxylated osteocalcin to alendronate monotherapy and combined therapy with vitamin K2 in postmenopausal women. J Bone Miner Metab. 2008;26: 260–4.
- Nakayama H, Hagiwara F, Tohma S. Three-year effects of bis-phosphonates on treatment of osteoporosis and on reducing the risk for vertebral fractures of rheumatoid arthritis patients. Os-teoporos Japan. 2007;15:13–8.
- Iwamoto J, Takeda T, Ichimura S. Effect of combined adminis-tration of vitamin D3 and vitamin K2 on bone mineral density of the lumbar spine in postmenopausal women with osteoporosis. J Orthop Sci. 2000;5: 546–51.
- Knapen MH, Schurgers LJ, Vermeer C. Vitamin K2 supple-mentation improves hip bone geometry and bone strength indices in postmenopausal women. Osteoporos Int. 2007;18: 963–72.