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Submitted on: 20 February 2006.
Revised on: 14 May 2006.
Accepted on: 03 July 2006.
___________________CLINICAL INFECTIOUS DISEASES---OXFORD UNIV PRESS INC
Submitted on: 22 August 2005.
Revised on: 21 October 2005.
Accepted on: 17 December 2005.
___________________CLINICAL INFECTIOUS DISEASES---OXFORD UNIV PRESS INC
Submitted on: 14 February 2000.
Revised on: 24 April 2000.
Accepted on: 22 June 2000.
___________________CLINICAL INFECTIOUS DISEASES---OXFORD UNIV PRESS INC
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