00534nas a2200169   4500000000100000000000100001008004100002100001600043700001500059700001800074700001400092700001300106245019500119300001200314490000600326022003200332       2018                            d1 aR. Costello1 aC. Jacklin1 aJameson Evans1 aJ. McBeth1 aW. Dixon00aRepresentativeness of a digitally engaged population and a patient organisation population with rheumatoid arthritis and their willingness to participate in research: a cross-sectional study  ae0006640 v4  a2056-5933 (Print) 2056-5933