Submitted on: 11 October 2006.
Revised on: 18 January 2007.
Accepted on: 14 February 2007.
___________________HEALTH AFFAIRS---PROJECT HOPE
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Submitted on: 11 October 2002.
Revised on: 06 December 2002.
Accepted on: 01 February 2003.
___________________HEALTH AFFAIRS---PROJECT HOPE
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