Updated consensus statement on biological agents, specifically tumour necrosis factor α (TNFα) blocking agents and interleukin-1 receptor antagonist (IL-1ra), for the treatment of rheumatic diseases, 2005 (Furst D E, Breedveld F C, J R Kalden, Smolen J S, Burmester G R, Bijlsma J W J, Dougados M, Emery P, Keystone E C, Klareskog L, Mease P J. Ann Rheum Dis 2005;64(suppl 4):iv2–14.)

An author has been omitted from the author list of this article. Arthur Kavanaugh, of University of California, San Diego, USA, should appear second from the end in the author list.