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Submitted on: 07 May 2014.
Revised on: 07 June 2014.
Accepted on: 17 July 2014.
___________________BMC MUSCULOSKELETAL DISORDERS---BMC
Submitted on: 30 November 2015.
Revised on: 11 March 2016.
Accepted on: 28 April 2016.
___________________BMC MUSCULOSKELETAL DISORDERS---BMC
Submitted on: 02 August 1999.
Revised on: 18 November 1999.
Accepted on: 20 December 1999.
___________________BMC MUSCULOSKELETAL DISORDERS---BMC
Submitted on: 04 April 2018.
Revised on: 21 June 2018.
Accepted on: 20 July 2018.
___________________BMC MUSCULOSKELETAL DISORDERS---BMC
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Submitted on: 11 September 2001.
Revised on: 11 December 2001.
Accepted on: 31 December 2001.
___________________BMC MUSCULOSKELETAL DISORDERS---BMC
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