9Gough AKS, Lilley J, Eyre S, et al. Generalised bone loss in patients with early rheumatoid arthritis. Lancet,1994,344:23-27.
10Haugeberg G, Uhlig T, Falch JA, et al. Bone mineral density and frequency of osteoporosis in female patients with rheumatoid arthritis. Arthritis Rheum, 2000,43:522-530.