Submitted on: 26 March 2002.
Revised on: 18 May 2002.
Accepted on: 06 July 2002.
___________________JOURNAL OF PUBLIC HEALTH POLICY
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Submitted on: 21 February 1999.
Revised on: 10 May 1999.
Accepted on: 26 June 1999.
___________________JOURNAL OF PUBLIC HEALTH POLICY
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http://reply.papertrans.cn/2/191/19008/19008-35.png
Submitted on: 14 May 2005.
Revised on: 06 August 2005.
Accepted on: 26 September 2005.
___________________JOURNAL OF PUBLIC HEALTH POLICY