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Submitted on: 18 October 2005.
Revised on: 19 November 2005.
Accepted on: 27 December 2005.
___________________DUKE LAW JOURNAL---DUKE UNIV
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Submitted on: 25 August 1999.
Revised on: 17 September 1999.
Accepted on: 27 October 1999.
___________________DUKE LAW JOURNAL---DUKE UNIV
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Submitted on: 03 September 2003.
Revised on: 25 October 2003.
Accepted on: 21 December 2003.
___________________DUKE LAW JOURNAL---DUKE UNIV
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