http://reply.papertrans.cn/2/112/11146/11146-31.png
Submitted on: 10 March 2003.
Revised on: 09 April 2003.
Accepted on: 14 May 2003.
___________________Health Services and Outcomes Research Methodology
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Submitted on: 22 January 2014.
Revised on: 28 April 2014.
Accepted on: 18 June 2014.
___________________Health Services and Outcomes Research Methodology
Submitted on: 15 June 2019.
Revised on: 04 September 2019.
Accepted on: 18 September 2019.
___________________Health Services and Outcomes Research Methodology
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