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Submitted on: 04 January 2006.
Revised on: 27 March 2006.
Accepted on: 05 May 2006.
___________________Journal of Occupational Medicine and Toxicology
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Submitted on: 01 June 2014.
Revised on: 05 August 2014.
Accepted on: 27 September 2014.
___________________Journal of Occupational Medicine and Toxicology
Submitted on: 01 April 2008.
Revised on: 24 April 2008.
Accepted on: 27 May 2008.
___________________Journal of Occupational Medicine and Toxicology
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Submitted on: 05 October 2017.
Revised on: 27 November 2017.
Accepted on: 20 January 2018.
___________________Journal of Occupational Medicine and Toxicology