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Submitted on: 21 March 2011.
Revised on: 14 July 2011.
Accepted on: 28 August 2011.
___________________JOURNAL OF HEALTH ECONOMICS---ELSEVIER
Submitted on: 21 March 2011.
Revised on: 19 June 2011.
Accepted on: 30 June 2011.
___________________JOURNAL OF HEALTH ECONOMICS---ELSEVIER
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Submitted on: 26 December 2008.
Revised on: 21 February 2009.
Accepted on: 06 April 2009.
___________________JOURNAL OF HEALTH ECONOMICS---ELSEVIER
Submitted on: 20 May 2004.
Revised on: 30 July 2004.
Accepted on: 12 September 2004.
___________________JOURNAL OF HEALTH ECONOMICS---ELSEVIER
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Submitted on: 07 October 2013.
Revised on: 29 December 2013.
Accepted on: 19 February 2014.
___________________JOURNAL OF HEALTH ECONOMICS---ELSEVIER