Submitted on: 30 June 2009.
Revised on: 04 August 2009.
Accepted on: 27 September 2009.
___________________ERGONOMICS---TAYLOR & FRANCIS LTD
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Submitted on: 29 September 2014.
Revised on: 30 October 2014.
Accepted on: 13 November 2014.
___________________ERGONOMICS---TAYLOR & FRANCIS LTD
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