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Submitted on: 01 September 2003.
Revised on: 30 September 2003.
Accepted on: 07 November 2003.
___________________Journal of Applied Biomaterials & Functional Materials
Submitted on: 28 April 1998.
Revised on: 07 August 1998.
Accepted on: 19 August 1998.
___________________Journal of Applied Biomaterials & Functional Materials