What is rheumatoid arthritis? Considering consequences of changed classification criteria.

Abstract

CHANGES IN CLASSIFICATION CRITERIA Rheumatoid arthritis (RA) was recognised as a separate disease entity in the middle of the 20th century. Since then several sets of classification criteria were developed for use in clinical studies. The 1987 American College of Rheumatology (ACR) criteria have been criticised as they are fulfilled rather late in the… (More)
DOI: 10.1136/annrheumdis-2016-209629

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