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Submitted on: 15 June 2011.
Revised on: 30 August 2011.
Accepted on: 21 September 2011.
___________________JA Clinical Reports---SPRINGER
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Submitted on: 22 December 2007.
Revised on: 07 February 2008.
Accepted on: 03 March 2008.
___________________JA Clinical Reports---SPRINGER
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