Bossuyt, Xavier Anticitrullinated protein antibodies: taking into account antibody levels improves interpretation. [electronic resource] - Annals of the rheumatic diseases 09 2017 - e33 p. digital Publication Type: Letter; Comment ISSN: 1468-2060 Standard No.: 10.1136/annrheumdis-2016-211039 doi Subjects--Topical Terms: CitrullineRheumatoid FactorSweden