Submitted on: 03 January 2022.
Revised on: 17 March 2022.
Accepted on: 27 April 2022.
___________________JOURNAL OF HEALTH ECONOMICS---ELSEVIER
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Submitted on: 13 October 2011.
Revised on: 06 January 2012.
Accepted on: 17 January 2012.
___________________JOURNAL OF HEALTH ECONOMICS---ELSEVIER
Submitted on: 30 June 2001.
Revised on: 13 August 2001.
Accepted on: 25 September 2001.
___________________JOURNAL OF HEALTH ECONOMICS---ELSEVIER