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Submitted on: 15 January 2007.
Revised on: 04 March 2007.
Accepted on: 25 March 2007.
___________________ENVIRONMENTAL AND MOLECULAR MUTAGENESIS
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Submitted on: 07 January 2011.
Revised on: 01 May 2011.
Accepted on: 19 June 2011.
___________________ENVIRONMENTAL AND MOLECULAR MUTAGENESIS
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