BMJ Publishing Group, Annals of the Rheumatic Diseases, Suppl 2(70), p. A5-A5, 2011
DOI: 10.1136/ard.2010.149096.11
BMJ Publishing Group, Annals of the Rheumatic Diseases, 8(70), p. 1461-1464
DOI: 10.1136/ard.2010.146506
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