Proposal for levels of evidence schema for validation of a soluble biomarker reflecting damage endpoints in rheumatoid arthritis, psoriatic arthritis, and ankylosing spondylitis, and recommendations for study design
scientific article published in August 2009
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author: Walter P Maksymowych, Dafna D. Gladman, Robert Landewé, William Taylor, Daniel Aletaha, Robert D. Inman, Tore K. Kvien, Désirée van der Heijde, George Wells, Philip J Mease, Christopher T Ritchlin, Oliver FitzGerald, Silje W Syversen, Joan M Bathon, Patrick Garnero, Piet Geusens, Hani El-Gabalawy, Mikkel Østergaard, Vivien P Bykerk, Robin Christensen
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