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Submitted on: 21 June 2005.
Revised on: 05 October 2005.
Accepted on: 10 November 2005.
___________________JBI Evidence Implementation---LIPPINCOTT WILLIAMS & WILKINS
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Submitted on: 14 January 1999.
Revised on: 08 April 1999.
Accepted on: 22 May 1999.
___________________JBI Evidence Implementation---LIPPINCOTT WILLIAMS & WILKINS
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Submitted on: 23 January 2001.
Revised on: 08 April 2001.
Accepted on: 22 May 2001.
___________________JBI Evidence Implementation---LIPPINCOTT WILLIAMS & WILKINS