Submitted on: 08 October 2014.
Revised on: 23 November 2014.
Accepted on: 25 December 2014.
___________________Egyptian Journal of Chest Diseases and Tuberculosis
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Submitted on: 20 June 2013.
Revised on: 28 August 2013.
Accepted on: 18 October 2013.
___________________Egyptian Journal of Chest Diseases and Tuberculosis
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Submitted on: 17 March 2020.
Revised on: 08 May 2020.
Accepted on: 06 June 2020.
___________________Egyptian Journal of Chest Diseases and Tuberculosis
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