Polypharmacy, declined walking speed, bent back, and disability associated with a history of falls in Japanese patients with rheumatoid arthritis: Results from the IORRA cohort study. Issue 3 (4th May 2021) - Oh, Koei; Furuya, Takefumi; Ikari, Katsunori; Inoue, Eisuke; Tanaka, Eiichi; Yamanaka, Hisashi; Okazaki, Ken; Harigai, Masayoshi