Submitted on: 08 September 2012.
Revised on: 16 October 2012.
Accepted on: 07 November 2012.
___________________Healthcare Technology Letters---WILEY
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Submitted on: 17 August 2011.
Revised on: 13 December 2011.
Accepted on: 31 January 2012.
___________________Healthcare Technology Letters---WILEY
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Submitted on: 27 December 1999.
Revised on: 05 February 2000.
Accepted on: 24 March 2000.
___________________Healthcare Technology Letters---WILEY
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