00403nas a2200145 4500000000100000000000100001008004100002100001500043700001600058700001600074700001300090245013400103490000600237022001400243 2012 d1 aC. Edwards1 aJ. Campbell1 aT. Van Staa1 aN. Arden00aRegional and temporal variation in the treatment of rheumatoid arthritis across the UK: a descriptive register-based cohort study0 v2 a2044-6055