Decrease in orthopaedic operations, including total joint replacements, in patients with rheumatoid arthritis between 2001 and 2007: data from Japanese outpatients in a single institute-based large observational cohort (IORRA). Issue 01 (9th December 2009) - Momohara, S; Inoue, E; Ikari, K; Kawamura, K; Tsukahara, S; Iwamoto, T; Hara, M; Taniguchi, A; Yamanaka, H