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Submitted on: 20 February 2005.
Revised on: 15 May 2005.
Accepted on: 07 July 2005.
___________________Health Services and Outcomes Research Methodology
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Submitted on: 09 April 2010.
Revised on: 02 August 2010.
Accepted on: 23 August 2010.
___________________Health Services and Outcomes Research Methodology
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Submitted on: 05 March 2000.
Revised on: 27 April 2000.
Accepted on: 26 May 2000.
___________________Health Services and Outcomes Research Methodology
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