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Submitted on: 29 November 2007.
Revised on: 23 January 2008.
Accepted on: 12 February 2008.
___________________International Journal of Rheumatology
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Submitted on: 21 May 2014.
Revised on: 26 August 2014.
Accepted on: 20 September 2014.
___________________International Journal of Rheumatology