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Correspondence
Increasing incidence of autoantibody-negative RA is replicated and is partly explained by an aging population
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Authors

  1. Correspondence to Ms Xanthe M E Matthijssen, Rheumatology, Leiden University Medical Center, 2333 ZA Leiden, Netherlands; X.M.E.Matthijssen{at}lumc.nl
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Citation

Matthijssen XME, Huizinga TWJ, van der Helm-van Mil AHM
Increasing incidence of autoantibody-negative RA is replicated and is partly explained by an aging population
Annals of the Rheumatic Diseases 2022;81:e69.

Publication history

  • Received April 14, 2020
  • Accepted May 4, 2020
  • First published May 29, 2020.
Online issue publication 
April 08, 2022

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© Author(s) (or their employer(s)) 2022. No commercial re-use. See rights and permissions. Published by BMJ.