Submitted on: 09 January 2005.
Revised on: 08 February 2005.
Accepted on: 28 February 2005.
___________________Applied Clinical Informatics---GEORG THIEME VERLAG KG
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Submitted on: 10 May 1999.
Revised on: 03 June 1999.
Accepted on: 15 July 1999.
___________________Applied Clinical Informatics---GEORG THIEME VERLAG KG
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