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Submitted on: 08 February 2008.
Revised on: 08 April 2008.
Accepted on: 25 April 2008.
___________________Journal of Thoracic Disease---AME PUBLISHING COMPANY
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Submitted on: 18 April 2012.
Revised on: 17 June 2012.
Accepted on: 24 July 2012.
___________________Journal of Thoracic Disease---AME PUBLISHING COMPANY
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Submitted on: 27 July 2008.
Revised on: 18 September 2008.
Accepted on: 13 October 2008.
___________________Journal of Thoracic Disease---AME PUBLISHING COMPANY
Submitted on: 23 December 2014.
Revised on: 13 April 2015.
Accepted on: 08 May 2015.
___________________Journal of Thoracic Disease---AME PUBLISHING COMPANY
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