Submitted on: 12 March 2009.
Revised on: 03 April 2009.
Accepted on: 24 April 2009.
Lancet Rheumatology---ELSEVIER
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Submitted on: 12 November 2016.
Revised on: 17 December 2016.
Accepted on: 10 January 2017.
Lancet Rheumatology---ELSEVIER
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Submitted on: 16 March 2003.
Revised on: 28 April 2003.
Accepted on: 09 May 2003.
Lancet Rheumatology---ELSEVIER