Age affects joint space narrowing in patients with early active rheumatoid arthritis
X M E Matthijssen, G Akdemir, I M Markusse, T Stijnen, N Riyazi, K H Han, C Bijkerk, P J S M Kerstens, W F Lems, T W J Huizinga, C F Allaart
RMD Open Oct 2016, 2 (2) e000338; DOI: 10.1136/rmdopen-2016-000338