Validity and completeness of rheumatoid arthritis diagnoses in the nationwide DANBIO clinical register and the Danish National Patient Registry by Ibfelt, Else Helene, Sørensen, Jan, Jensen, Dorte V, Dreyer, Lene, Schiøttz-Christensen, Berit, Thygesen, Pia H, Colic, Ada, Raun, Johnny L, Manilo, Natalia, Rødgaard, Anne, Poulsen, Uta E, Rasmussen, Claus, Hansen, Torben, Unger, Babara, Pelck, Randi, Kincses, Anita, Nordin, Henrik, Lorenzen, Tove, Theibich, Ali, Jensen Hansen, Inger Marie, Espesen, Jakob, Grydehøj, Jolanta, Holland-Fischer, Mette, Loft, Anne Gitte, Hetland, Merete Lund

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