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Submitted on: 07 May 2013.
Revised on: 02 September 2013.
Accepted on: 22 October 2013.
___________________Biomedical Engineering-Biomedizinische Technik
Submitted on: 19 September 2010.
Revised on: 11 January 2011.
Accepted on: 22 January 2011.
___________________Biomedical Engineering-Biomedizinische Technik