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Submitted on: 14 July 2006.
Revised on: 27 September 2006.
Accepted on: 10 November 2006.
___________________BIOMEDICAL AND ENVIRONMENTAL SCIENCES
Submitted on: 25 July 2012.
Revised on: 05 October 2012.
Accepted on: 29 October 2012.
___________________BIOMEDICAL AND ENVIRONMENTAL SCIENCES
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Submitted on: 24 January 2015.
Revised on: 25 February 2015.
Accepted on: 17 April 2015.
___________________BIOMEDICAL AND ENVIRONMENTAL SCIENCES
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Submitted on: 21 March 2001.
Revised on: 11 June 2001.
Accepted on: 07 August 2001.
___________________BIOMEDICAL AND ENVIRONMENTAL SCIENCES
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