Paul Emery, Désirée van der Heijde, Mikkel Østergaard, Philip G Conaghan, Mark C Genovese, Edward C Keystone, Roy Fleischmann, Elizabeth C Hsia, Weichun Xu, Stephen Xu, Mahboob U Rahman
Ann Rheum Dis. 2011 December 1; 70(12): 2126–2130. Published online 2011 September 16. doi: 10.1136/ard.2011.154500