Editorial: Methotrexate saves lives: A pearl of observational research

Authors

  • Robert B. M. Landewé

    Corresponding author
    1. Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands, and Atrium Medical Center, Heerlen, The Netherlands
    • Department of Clinical Immunology and Rheumatology, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105AZ Amsterdam, The Netherlands
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