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Submitted on: 03 February 2003.
Revised on: 23 April 2003.
Accepted on: 23 May 2003.
___________________International Journal of Rheumatic Diseases
Submitted on: 20 September 2008.
Revised on: 19 December 2008.
Accepted on: 09 February 2009.
___________________International Journal of Rheumatic Diseases
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