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.
Maksymowych WP, Fitzgerald O, Wells GA, Gladman DD, Landewé R, Ostergaard M, Taylor WJ, Christensen R, Tak PP, Boers M, Syversen SW, Bathon JM, Ritchlin CJ, Mease PJ, Bykerk VP, Garnero P, Geusens P, El-Gabalawy H, Aletaha D, Inman RD, Kraus VB, Kvien TK, van der Heijde D.
Maksymowych WP, et al.
J Rheumatol. 2009 Aug;36(8):1792-9. doi: 10.3899/jrheum090347.
J Rheumatol. 2009.
PMID: 19671814